diff --git a/themes/classic/navigator/navigator.css b/themes/classic/navigator/navigator.css
index a6e011a64da9..d57b4ac2369b 100644
--- a/themes/classic/navigator/navigator.css
+++ b/themes/classic/navigator/navigator.css
@@ -320,10 +320,8 @@
   list-style-image: url("chrome://communicator/skin/icons/lock-insecure.gif");
 }
 
-#security-button[level="high"] {
-  list-style-image: url("chrome://communicator/skin/icons/lock-secure.gif");
-}
-
+/* |high| and |low| styles could be different, to better reflect the secure level... */
+#security-button[level="high"],
 #security-button[level="low"] {
   list-style-image: url("chrome://communicator/skin/icons/lock-secure.gif");
 }
diff --git a/themes/modern/navigator/navigator.css b/themes/modern/navigator/navigator.css
index fbaffe3d9a33..c860e2f415e8 100644
--- a/themes/modern/navigator/navigator.css
+++ b/themes/modern/navigator/navigator.css
@@ -563,10 +563,8 @@ toolbarbutton.chevron > .toolbarbutton-menu-dropmarker {
   list-style-image: url("chrome://communicator/skin/icons/lock-insecure.gif");
 }
 
-#security-button[level="high"] {
-  list-style-image: url("chrome://communicator/skin/icons/lock-secure.gif");
-}
-
+/* |high| and |low| styles could be different, to better reflect the secure level... */
+#security-button[level="high"],
 #security-button[level="low"] {
   list-style-image: url("chrome://communicator/skin/icons/lock-secure.gif");
 }