diff --git a/AMBuildScript b/AMBuildScript
index b902b0d..e176f77 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -348,7 +348,7 @@ class MMSConfig(object):
 
     compiler.defines += ['SOURCE_ENGINE=' + sdk.code]
 
-    if sdk.name in ['sdk2013', 'bms'] and compiler.like('gcc'):
+    if sdk.name in ['sdk2013', 'bms', 'tf2', 'css', 'dods', 'hl2dm'] and compiler.like('gcc'):
       # The 2013 SDK already has these in public/tier0/basetypes.h
       compiler.defines.remove('stricmp=strcasecmp')
       compiler.defines.remove('_stricmp=strcasecmp')