diff --git a/m4/Makefile.am b/m4/Makefile.am
index dc48b5b8a78f300a7b70bef9994319a46cba1b9e..59cf4dbeac593c1aa2fe0546d6cb1e34743bbdb3 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -41,6 +41,7 @@ ALLM4S = 					\
 	libtoolcompat.m4			\
 	make_shared.m4				\
 	mpi-config.m4				\
+	mprotect.m4				\
 	opengl.m4				\
 	parmetis.m4				\
 	shared_ptr.m4				\