diff --git a/Makefile.am b/Makefile.am
index 50458770..e88b0d3e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,3 +1,5 @@
+ACLOCAL_AMFLAGS = -I m4
+
 SUBDIRS = compose data doc include lib po src tests
 # Only build GParted help documentation when enabled.  (Can be disabled
 # with './configure --disable-doc').