diff --git a/data/theme/gnome-shell-sass/_common.scss b/data/theme/gnome-shell-sass/_common.scss
index 9dedbdcd3..afd1be5dd 100644
--- a/data/theme/gnome-shell-sass/_common.scss
+++ b/data/theme/gnome-shell-sass/_common.scss
@@ -1031,6 +1031,11 @@ StScrollBar {
             -st-icon-style: symbolic;
           }
 
+          .message-icon-bin > .fallback-window-icon {
+            width: 1.09em;
+            height: 1.09em;
+          }
+
           .message-secondary-bin {
             padding: 0 0.82em;;
           }