diff --git a/zsnes/src/gui/guimouse.inc b/zsnes/src/gui/guimouse.inc
index 3537dfe5..ce518a1d 100644
--- a/zsnes/src/gui/guimouse.inc
+++ b/zsnes/src/gui/guimouse.inc
@@ -2667,7 +2667,7 @@ DisplayGUIVideoClick:
   mov [GUIHoldXlimR],eax
 .nomovebar
 .notntsctab
-EXTSYm NTSCFilterInit
+EXTSYM NTSCFilterInit
   xor al,al
   pushad
   call NTSCFilterInit