diff --git a/build/org.eclipse.cdt.make.ui/plugin.xml b/build/org.eclipse.cdt.make.ui/plugin.xml
index 3a22375603d..4c3f4646ae5 100644
--- a/build/org.eclipse.cdt.make.ui/plugin.xml
+++ b/build/org.eclipse.cdt.make.ui/plugin.xml
@@ -270,7 +270,7 @@
       <editor
             name="Makefile Editor"
             icon="icons/ctool16/makefile.gif"
-            filenames="Makefile, makefile"
+            filenames="Makefile,makefile"
 	    contributorClass="org.eclipse.cdt.make.internal.ui.editor.MakefileEditorActionContributor"
             class="org.eclipse.cdt.make.internal.ui.editor.MakefileEditor"
             id="org.eclipse.cdt.make.editor">