--- docsis-0.9.5/configure.in~	2007-09-22 00:55:03.862858273 +0200
+++ docsis-0.9.5/configure.in	2007-09-22 00:58:30.177668639 +0200
@@ -16,7 +16,7 @@
   AC_MSG_ERROR([M4 is required])
 else
   ac_m4_vers=`$M4 --version 2>/dev/null | head -1` ;
-  ac_is_gnu_m4=`echo $ac_m4_vers | cut -d' ' -f1`;
+  ac_is_gnu_m4=`echo $ac_m4_vers | grep -q GNU && echo GNU` ;
   if test "x$ac_is_gnu_m4" = "xGNU"; then
 	AC_MSG_RESULT([   found $ac_m4_vers at $M4 ])
   else