diff --git a/themes/classic/global/mac/toolbar.css b/themes/classic/global/mac/toolbar.css
index bf6098955690..68c28633a4ef 100644
--- a/themes/classic/global/mac/toolbar.css
+++ b/themes/classic/global/mac/toolbar.css
@@ -95,7 +95,7 @@ toolbargrippy[tbgrippy-collapsed="true"] {
 toolbargrippy[tbgrippy-collapsed="true"] > .toolbargrippy-texture {
   margin-top: 0;
   margin-left: 2px;
-  width: none;
+  width: 0px;
   height: 6px;
 }
 
diff --git a/themes/classic/global/win/toolbar.css b/themes/classic/global/win/toolbar.css
index 5ade9b0241d5..aa20a7f25172 100644
--- a/themes/classic/global/win/toolbar.css
+++ b/themes/classic/global/win/toolbar.css
@@ -93,7 +93,7 @@ toolbargrippy[tbgrippy-collapsed="true"] {
 toolbargrippy[tbgrippy-collapsed="true"] > .toolbargrippy-texture {
   margin-top: 0;
   margin-left: 2px;
-  width: none;
+  width: 0px;
   height: 6px;
 }