diff --git a/src/optionstr.c b/src/optionstr.c
index 8b000ab..457fccb 100644
--- a/src/optionstr.c
+++ b/src/optionstr.c
@@ -2438,7 +2438,7 @@
 }
 #endif
 
-#if defined(FEAT_GUI_GTK) || defined(PROTO)
+#if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_MSWIN) || defined(PROTO)
 /*
  * The 'guiligatures' option is changed.
  */