diff --git a/configure.ac b/configure.ac
index 52816c0a2..e2d156dca 100644
--- a/configure.ac
+++ b/configure.ac
@@ -276,7 +276,7 @@ fi
 fi
 
 # hack to define a short filename also for out-of-tree build
-if test `dirname $0` = `pwd`; then
+if test `dirname $0` = `pwd` || test "$0" = ./configure; then
 	HWLIB_CFLAGS="$HWLIB_CFLAGS "'-D__file__=__FILE__'
 else
 	HWLIB_CFLAGS="$HWLIB_CFLAGS "'-D__file__="\"$(subst $(srcdir)/,,$(abspath $<))\""'