diff --git a/configure.ac b/configure.ac
index 71dd7a6..6741ec6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,6 +38,7 @@ m4_ifndef([PKG_PREREQ],
 
 AC_CONFIG_AUX_DIR(build)dnl
 AC_CONFIG_MACRO_DIRS([build])
+AC_CONFIG_MACRO_DIR([m4])
 
 eval `$ac_aux_dir/version.sh`
 if test -z "$OL_STRING"; then