diff --git a/grammars/shadercode-cg.cson b/grammars/shadercode-cg.cson
index 70ef21f..cc5feca 100644
--- a/grammars/shadercode-cg.cson
+++ b/grammars/shadercode-cg.cson
@@ -3,6 +3,7 @@
 'fileTypes': [
   'fx'
   'cg'
+  'cginc'
   'shader'
 ]
 'foldingStartMarker': '/\\*\\*|\\{\\s*$'