diff --git a/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/swt_theming_fixes_gtk_3_20.css b/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/swt_theming_fixes_gtk_3_20.css
index 04c9ef1b2f4..4619cc07191 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/swt_theming_fixes_gtk_3_20.css	
+++ b/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/swt_theming_fixes_gtk_3_20.css	
@@ -1,6 +1,10 @@
+/* Horizontal padding is neutralized so that adjacent ToolBars keep the same item
+   pitch as items within a single ToolBar. */
 toolbar {
 	padding-top: 2px;
 	padding-bottom: 2px;
+	padding-left: 0px;
+	padding-right: 0px;
 }
 
 toolbar button {