diff --git a/WindowMaker/Defaults/Makefile.am b/WindowMaker/Defaults/Makefile.am
index 04511643..5692f30e 100644
--- a/WindowMaker/Defaults/Makefile.am
+++ b/WindowMaker/Defaults/Makefile.am
@@ -25,5 +25,5 @@ WMState: $(srcdir)/WMState.in
 	chmod 644 WMState
 
 WMRootMenu: $(srcdir)/../plmenu
-	-cp -f ../plmenu WMRootMenu
+	-cp -f $(srcdir)/../plmenu WMRootMenu