diff --git a/configure b/configure
index dd6f029..b6409d4 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,6 @@
 #!/bin/sh
 # $Id$
+M4=m4
 FLAGS=""
 
 target=""
@@ -99,7 +100,7 @@ fi
 
 echo "Generating Makefile... "
 
-if ! m4 $FLAGS Makefile.m4 > Makefile; then
+if ! $M4 $FLAGS Makefile.m4 > Makefile; then
 	echo "(M4 exited with non-zero status)"
 	rm -f Makefile
 	exit 1