diff --git a/configure.ac b/configure.ac
index 5a80c6b..07c37bf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,6 +3,7 @@ AC_CONFIG_SRCDIR([src/spek.cc])
 AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([1.11.1 foreign no-dist-gzip dist-xz serial-tests])
 AM_SILENT_RULES([yes])
+AC_CONFIG_MACRO_DIRS([m4])
 
 AC_LANG([C++])
 AM_PROG_AR