diff --git a/themes/Default/common.css b/themes/Default/common.css
index faf0280ce4..f9b9da98dc 100644
--- a/themes/Default/common.css
+++ b/themes/Default/common.css
@@ -671,8 +671,12 @@ border {
 }
 
 /* The border around frames in dialogs */
-dialog .frame {
-    border: 1px solid @border-color;
+dialog notebook.frame {
+  border: 1px solid @border-color;
+}
+
+GimpColorNotebook notebook.frame {
+  border-width: 0px;
 }
 
 /* The border around GimpOffsetArea frame in resize dialogs */