diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Dark/HLSL.xshd b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Dark/HLSL.xshd
index 9fa342a..e91fce1 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Dark/HLSL.xshd
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Dark/HLSL.xshd
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<SyntaxDefinition name="HLSL" extensions=".hlsl">
+<SyntaxDefinition name="HLSL" extensions=".hlsl;.fx">
 
 	<Environment>
 		<Default color="#D4D4D4" bgcolor="#1E1E1E"/>
diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Light/HLSL.xshd b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Light/HLSL.xshd
index 2901ae8..c2d91e6 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Light/HLSL.xshd
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Syntax/Light/HLSL.xshd
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<SyntaxDefinition name="HLSL" extensions=".hlsl">
+<SyntaxDefinition name="HLSL" extensions=".hlsl;.fx">
 
 	<Environment>
 		<Default color="Black" bgcolor="#FFFFFF"/>