diff --git a/ruby.jsf b/ruby.jsf
index 8544877..c8e5661 100644
--- a/ruby.jsf
+++ b/ruby.jsf
@@ -174,7 +174,7 @@ done
 
 :not_string Idle
 	*		rest		noeat
-	"A-Za-z_"	global_var	recolor=-2
+	"a-zA-Z0-9_"	global_var	recolor=-2
 	"\"'`#/"	rest
 
 :brace Brace