--- xlock/XLock.ad
+++ xlock/XLock.ad
@@ -75,8 +75,8 @@
 !XLock.messagefont: -*-times-*-*-*-*-18-*-*-*-*-*-*-*
 
 ! For modes with images
-!XLock.*.bitmap: bitmaps/m-xlock.xbm
-!XLock.*.bitmap: pixmaps/m-xlock.xpm
+XLock.*.bitmap: /usr/X11R6/include/X11/bitmaps/m-xlock.xbm
+XLock.*.bitmap: /usr/X11R6/include/X11/pixmaps/m-xlock.xpm
 !XLock.*.bitmap: /usr/lib/X11/xlock/bitmaps
 
 ! For mailbox check application