diff --git a/extensions/bintools/sdk/smsdk_ext.h b/extensions/bintools/sdk/smsdk_ext.h
index f75071ac..4324a11b 100644
--- a/extensions/bintools/sdk/smsdk_ext.h
+++ b/extensions/bintools/sdk/smsdk_ext.h
@@ -269,11 +269,15 @@ extern IServerGameDLL *gamedll;
 #define SM_GET_IFACE(prefix, addr) \
 	if (!g_pShareSys->RequestInterface(SM_MKIFACE(prefix), myself, (SMInterface **)&addr)) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 /** Automates retrieving SourceMod interfaces when needed outside of SDK_OnLoad() */
 #define SM_GET_LATE_IFACE(prefix, addr) \
@@ -282,11 +286,15 @@ extern IServerGameDLL *gamedll;
 #define SM_CHECK_IFACE(prefix, addr) \
 	if (!addr) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_BASESDK_H_
diff --git a/extensions/cstrike/sdk/smsdk_ext.h b/extensions/cstrike/sdk/smsdk_ext.h
index 7a133bf8..905e13a6 100644
--- a/extensions/cstrike/sdk/smsdk_ext.h
+++ b/extensions/cstrike/sdk/smsdk_ext.h
@@ -273,11 +273,15 @@ extern IServerGameDLL *gamedll;
 #define SM_GET_IFACE(prefix, addr) \
 	if (!g_pShareSys->RequestInterface(SM_MKIFACE(prefix), myself, (SMInterface **)&addr)) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 /** Automates retrieving SourceMod interfaces when needed outside of SDK_OnLoad() */
 #define SM_GET_LATE_IFACE(prefix, addr) \
@@ -286,11 +290,15 @@ extern IServerGameDLL *gamedll;
 #define SM_CHECK_IFACE(prefix, addr) \
 	if (!addr) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_BASESDK_H_
diff --git a/extensions/geoip/sdk/smsdk_ext.h b/extensions/geoip/sdk/smsdk_ext.h
index f75071ac..4324a11b 100644
--- a/extensions/geoip/sdk/smsdk_ext.h
+++ b/extensions/geoip/sdk/smsdk_ext.h
@@ -269,11 +269,15 @@ extern IServerGameDLL *gamedll;
 #define SM_GET_IFACE(prefix, addr) \
 	if (!g_pShareSys->RequestInterface(SM_MKIFACE(prefix), myself, (SMInterface **)&addr)) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 /** Automates retrieving SourceMod interfaces when needed outside of SDK_OnLoad() */
 #define SM_GET_LATE_IFACE(prefix, addr) \
@@ -282,11 +286,15 @@ extern IServerGameDLL *gamedll;
 #define SM_CHECK_IFACE(prefix, addr) \
 	if (!addr) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_BASESDK_H_
diff --git a/extensions/mysql/sdk/smsdk_ext.h b/extensions/mysql/sdk/smsdk_ext.h
index f75071ac..4324a11b 100644
--- a/extensions/mysql/sdk/smsdk_ext.h
+++ b/extensions/mysql/sdk/smsdk_ext.h
@@ -269,11 +269,15 @@ extern IServerGameDLL *gamedll;
 #define SM_GET_IFACE(prefix, addr) \
 	if (!g_pShareSys->RequestInterface(SM_MKIFACE(prefix), myself, (SMInterface **)&addr)) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 /** Automates retrieving SourceMod interfaces when needed outside of SDK_OnLoad() */
 #define SM_GET_LATE_IFACE(prefix, addr) \
@@ -282,11 +286,15 @@ extern IServerGameDLL *gamedll;
 #define SM_CHECK_IFACE(prefix, addr) \
 	if (!addr) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_BASESDK_H_
diff --git a/extensions/sdktools/sdk/smsdk_ext.h b/extensions/sdktools/sdk/smsdk_ext.h
index 69fc3b0e..fdda6ad3 100644
--- a/extensions/sdktools/sdk/smsdk_ext.h
+++ b/extensions/sdktools/sdk/smsdk_ext.h
@@ -279,11 +279,15 @@ extern IServerGameDLL *gamedll;
 #define SM_GET_IFACE(prefix, addr) \
 	if (!g_pShareSys->RequestInterface(SM_MKIFACE(prefix), myself, (SMInterface **)&addr)) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 /** Automates retrieving SourceMod interfaces when needed outside of SDK_OnLoad() */
 #define SM_GET_LATE_IFACE(prefix, addr) \
@@ -292,11 +296,15 @@ extern IServerGameDLL *gamedll;
 #define SM_CHECK_IFACE(prefix, addr) \
 	if (!addr) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_BASESDK_H_
diff --git a/extensions/sqlite/sdk/smsdk_ext.h b/extensions/sqlite/sdk/smsdk_ext.h
index f75071ac..4324a11b 100644
--- a/extensions/sqlite/sdk/smsdk_ext.h
+++ b/extensions/sqlite/sdk/smsdk_ext.h
@@ -269,11 +269,15 @@ extern IServerGameDLL *gamedll;
 #define SM_GET_IFACE(prefix, addr) \
 	if (!g_pShareSys->RequestInterface(SM_MKIFACE(prefix), myself, (SMInterface **)&addr)) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 /** Automates retrieving SourceMod interfaces when needed outside of SDK_OnLoad() */
 #define SM_GET_LATE_IFACE(prefix, addr) \
@@ -282,11 +286,15 @@ extern IServerGameDLL *gamedll;
 #define SM_CHECK_IFACE(prefix, addr) \
 	if (!addr) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_BASESDK_H_
diff --git a/extensions/topmenus/sdk/smsdk_ext.h b/extensions/topmenus/sdk/smsdk_ext.h
index 83038a72..b37ce03f 100644
--- a/extensions/topmenus/sdk/smsdk_ext.h
+++ b/extensions/topmenus/sdk/smsdk_ext.h
@@ -290,11 +290,15 @@ extern IServerGameDLL *gamedll;
 #define SM_GET_IFACE(prefix, addr) \
 	if (!g_pShareSys->RequestInterface(SM_MKIFACE(prefix), myself, (SMInterface **)&addr)) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s (version: %d)", SMINTERFACE_##prefix##_NAME, SMINTERFACE_##prefix##_VERSION); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 /** Automates retrieving SourceMod interfaces when needed outside of SDK_OnLoad() */
 #define SM_GET_LATE_IFACE(prefix, addr) \
@@ -303,11 +307,15 @@ extern IServerGameDLL *gamedll;
 #define SM_CHECK_IFACE(prefix, addr) \
 	if (!addr) \
 	{ \
-		if (error) \
+		if (error != NULL && maxlength) \
 		{ \
-			snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
-			return false; \
+			size_t len = snprintf(error, maxlength, "Could not find interface: %s", SMINTERFACE_##prefix##_NAME); \
+			if (len >= maxlength) \
+			{ \
+				error[maxlength - 1] = '\0'; \
+			} \
 		} \
+		return false; \
 	}
 
 #endif // _INCLUDE_SOURCEMOD_EXTENSION_BASESDK_H_