--- Makefile.am	2008-05-04 14:39:47.000000000 -0700
+++ Makefile.am	2008-11-20 23:41:02.531250000 -0800
@@ -35,7 +35,7 @@
 
 TESTS = check-guile
 
-ACLOCAL_AMFLAGS = -I guile-config
+ACLOCAL_AMFLAGS = -I m4 -I guile-config
 
 DISTCLEANFILES = check-guile.log