diff --git a/js/ui/workspace.js b/js/ui/workspace.js
index a93ec2726..cb3c212ee 100644
--- a/js/ui/workspace.js
+++ b/js/ui/workspace.js
@@ -464,7 +464,7 @@ var WorkspaceLayout = GObject.registerClass({
         const [leftOversize, rightOversize] = window.chromeWidths();
 
         if (rowSpacing)
-            rowSpacing += Math.max(topOversize, bottomOversize);
+            rowSpacing += topOversize + bottomOversize;
         if (colSpacing)
             colSpacing += Math.max(leftOversize, rightOversize);