diff --git a/Makefile.am b/Makefile.am
index 97fe1fe..e9ef41d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,6 +12,10 @@ EXTRA_DIST = \
 	autogen.sh \
 	m4/ax_gcc_builtin.m4 \
 	m4/ax_pkg_config.m4 \
-	m4/cryb_to.m4 \
 	tools/coverage.sh.in \
 	tools/setprops.sh
+
+if CRYB_CORE
+aclocaldir = $(datarootdir)/aclocal
+aclocal_DATA = m4/cryb_to.m4
+endif CRYB_CORE