diff --git a/Tools/Source/TianoTools/Common/CommonLib.h b/Tools/Source/TianoTools/Common/CommonLib.h
index 157aa7aec0..fd8b6a48f7 100644
--- a/Tools/Source/TianoTools/Common/CommonLib.h
+++ b/Tools/Source/TianoTools/Common/CommonLib.h
@@ -129,6 +129,7 @@ PrintGuidToBuffer (
 
 #ifdef __GNUC__
 #define stricmp strcasecmp
+#define strnicmp strncasecmp
 #define strcmpi strcasecmp
 #endif