diff --git a/ChangeLog b/ChangeLog
index a6c1f8279..c64b6efbd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,9 @@
    Added 'About this file' and links for some Windows developer tools.
    Added notes on adding a source file to src/ and brief notes on adding
    a filetype.
+ * src/build.c:
+   Hopefully fix gtk_widget_set_sensitive assertion failed warning on
+   Windows.
 
 
 2007-06-18  Enrico Tröger  <enrico.troeger@uvena.de>
diff --git a/src/build.c b/src/build.c
index b113043dc..cca5107a9 100644
--- a/src/build.c
+++ b/src/build.c
@@ -1676,7 +1676,8 @@ void build_menu_update(gint idx)
 	// simply enable next error command if the compiler window has any items
 	have_errors = gtk_tree_model_iter_n_children(GTK_TREE_MODEL(msgwindow.store_compiler),
 		NULL) > 0;
-	gtk_widget_set_sensitive(menu_items->item_next_error, have_errors);
+	if (menu_items->item_next_error)
+		gtk_widget_set_sensitive(menu_items->item_next_error, have_errors);
 }