diff --git a/core/org.eclipse.cdt.ui/css/e4-dark_cdt.css b/core/org.eclipse.cdt.ui/css/e4-dark_cdt.css
index 82fb3590628..e23aa9085e3 100644
--- a/core/org.eclipse.cdt.ui/css/e4-dark_cdt.css
+++ b/core/org.eclipse.cdt.ui/css/e4-dark_cdt.css
@@ -14,7 +14,7 @@
  * Doug Schaefer - getting this into CDT
  ******************************************************************************/
 
-IEclipsePreferences#org-eclipse-cdt-ui			 {
+IEclipsePreferences#org-eclipse-cdt-ui:org-eclipse-cdt-ui {
 	preferences:
 		"asm_directive=221,40,103"
 		"asm_label=217,232,247"