diff --git a/src/sbbs3/js_bbs.cpp b/src/sbbs3/js_bbs.cpp
index d3233d44697a6ddec22895a05acd64dae30ed61e..59d5b8eb0527c81df89a97abe5b6db0e8995db75 100644
--- a/src/sbbs3/js_bbs.cpp
+++ b/src/sbbs3/js_bbs.cpp
@@ -2944,7 +2944,7 @@ js_telnet_gate(JSContext *cx, uintN argc, jsval *arglist)
 	return(JS_TRUE);
 }
 
-#define TG_MODE_UNSPECIFIED	~0
+#define TG_MODE_UNSPECIFIED	~0U
 static JSBool
 js_rlogin_gate(JSContext *cx, uintN argc, jsval *arglist)
 {