diff --git a/m4/Makefile.am b/m4/Makefile.am
index b44430526dd501f6e7792f0dbedc07bf5f3e5351..031d934ba5e2e93dc26b6709636c8b46af6ace98 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -5,7 +5,7 @@ ALLM4S = 					\
 	acx_lapack.m4				\
 	acx_mpi.m4				\
 	acx_pthread.m4				\
-	ax_boost_base				\
+	ax_boost_base.m4				\
 	ax_check_gl.m4				\
 	ax_lang_compiler_ms.m4			\
 	boost_fusion				\