diff --git a/core/sourcemm_api.cpp b/core/sourcemm_api.cpp
index 3ac89de7..0ee04a95 100644
--- a/core/sourcemm_api.cpp
+++ b/core/sourcemm_api.cpp
@@ -33,6 +33,7 @@
 #include "sourcemm_api.h"
 #include "sm_version.h"
 #include "Logger.h"
+#include "ExtensionSys.h"
 #include "concmd_cleaner.h"
 #include "compat_wrappers.h"
 
@@ -219,3 +220,21 @@ void SourceMod_Core::OnPluginUnload(PluginId id)
 }
 
 #endif
+
+void *SourceMod_Core::OnMetamodQuery(const char *iface, int *ret)
+{
+	void *ptr = NULL;
+
+	if (strcmp(iface, SOURCEMOD_INTERFACE_EXTENSIONS) == 0)
+	{
+		ptr = (IExtensionManager *)&g_Extensions;
+	}
+
+	if (ret != NULL)
+	{
+		*ret = (ptr == NULL) ? IFACE_FAILED : IFACE_OK;
+	}
+
+	return NULL;
+}
+
diff --git a/core/sourcemm_api.h b/core/sourcemm_api.h
index 7fba5258..85b85817 100644
--- a/core/sourcemm_api.h
+++ b/core/sourcemm_api.h
@@ -79,6 +79,7 @@ public:
 #else
 	void OnPluginUnload(PluginId id);
 #endif
+	void *OnMetamodQuery(const char *iface, int *ret);
 };
 
 extern SourceMod_Core g_SourceMod_Core;
@@ -105,3 +106,4 @@ extern int vsp_version;
 PLUGIN_GLOBALVARS();
 
 #endif //_INCLUDE_SOURCEMOD_MM_API_H_
+
diff --git a/core/sourcemod.cpp b/core/sourcemod.cpp
index 777e98fe..e59afd31 100644
--- a/core/sourcemod.cpp
+++ b/core/sourcemod.cpp
@@ -406,6 +406,9 @@ void SourceModBase::DoGlobalPluginLoads()
 	/* Load any auto extensions */
 	g_Extensions.TryAutoload();
 
+	/* Fire the extensions ready message */
+	g_SMAPI->MetaFactory(SOURCEMOD_NOTICE_EXTENSIONS, NULL, NULL);	
+
 	/* Load any game extension */
 	const char *game_ext;
 	if ((game_ext = g_pGameConf->GetKeyValue("GameExtension")) != NULL)
diff --git a/public/IExtensionSys.h b/public/IExtensionSys.h
index 31b8d647..1c64bd84 100644
--- a/public/IExtensionSys.h
+++ b/public/IExtensionSys.h
@@ -288,6 +288,24 @@ namespace SourceMod
 		virtual const char *GetExtensionDateString() =0;
 	};
 
+	/**
+	 * @brief Returned via OnMetamodQuery() to get an IExtensionManager pointer.
+	 */
+	#define SOURCEMOD_INTERFACE_EXTENSIONS				"SM_ExtensionManager"
+
+	/**
+	 * @brief Fired through OnMetamodQuery() to notify plugins that SourceMod is 
+	 * loaded.  
+	 *
+	 * Plugins should not return an interface pointer or IFACE_OK, instead, 
+	 * they should attach as needed by searching for SOURCEMOD_INTERFACE_EXTENSIONS.
+	 *
+	 * This may be fired more than once; if already attached, an extension should 
+	 * not attempt to re-attach.  The purpose of this is to notify Metamod:Source 
+	 * plugins which load after SourceMod loads.
+	 */
+	#define SOURCEMOD_NOTICE_EXTENSIONS					"SM_ExtensionsAttachable"
+
 	#define SMINTERFACE_EXTENSIONMANAGER_NAME			"IExtensionManager"
 	#define SMINTERFACE_EXTENSIONMANAGER_VERSION		2
 
@@ -389,7 +407,8 @@ namespace SourceMod
 		}
 
 	#define SM_FIND_IFACE(prefix, variable) \
-		sharesys->RequestInterface(SM_IFACEPAIR(prefix), myself, (SMInterface **)&variable));
+		sharesys->RequestInterface(SM_IFACEPAIR(prefix), myself, (SMInterface **)&variable);
 }
 
 #endif //_INCLUDE_SOURCEMOD_MODULE_INTERFACE_H_
+`