diff --git a/core/ExtensionSys.cpp b/core/ExtensionSys.cpp
index ed39b676..d1bd929f 100644
--- a/core/ExtensionSys.cpp
+++ b/core/ExtensionSys.cpp
@@ -108,24 +108,6 @@ CLocalExtension::CLocalExtension(const char *filename)
 		goto normal;
 	}
 
-	/* COMPAT HACK: One-halfth, if ep2v, see if there is an engine specific build in the new place with old naming */
-	if (strcmp(smcore.gamesuffix, "2.tf2") == 0
-		|| strcmp(smcore.gamesuffix, "2.dods") == 0
-		|| strcmp(smcore.gamesuffix, "2.hl2dm") == 0
-		)
-	{
-		g_pSM->BuildPath(Path_SM,
-			path,
-			PLATFORM_MAX_PATH,
-			"extensions/%s.2.ep2v." PLATFORM_LIB_EXT,
-			filename);
-
-		if (libsys->IsPathFile(path))
-		{
-			goto found;
-		}
-	}
-
 	/* Zeroth, see if there is an engine specific build in the new place. */
 	g_SourceMod.BuildPath(Path_SM,
 		path,
@@ -138,6 +120,20 @@ CLocalExtension::CLocalExtension(const char *filename)
 		goto found;
 	}
 
+#if SOURCE_ENGINE == SE_TF2 || SOURCE_ENGINE == SE_DODS || SOURCE_ENGINE == SE_HL2DM
+	/* COMPAT HACK: One-halfth, if ep2v, see if there is an engine specific build in the new place with old naming */
+	g_SourceMod.BuildPath(Path_SM,
+		path,
+		PLATFORM_MAX_PATH,
+		"extensions/%s.2.ep2v." PLATFORM_LIB_EXT,
+		filename);
+
+	if (g_LibSys.IsPathFile(path))
+	{
+		goto found;
+	}
+#endif
+
 	/* First see if there is an engine specific build! */
 	g_SourceMod.BuildPath(Path_SM, 
 		path,