--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,7 @@
 ## Process this file with automake to produce Makefile.in
 
 AUTOMAKE_OPTIONS = 1.6 foreign dist-zip dist-bzip2
+ACLOCAL_AMFLAGS = -I m4
 
 SUBDIRS = m4 include vq lib examples test doc