diff --git a/include/osmocom/Makefile.am b/include/osmocom/Makefile.am
index dbc2344..b75c86a 100644
--- a/include/osmocom/Makefile.am
+++ b/include/osmocom/Makefile.am
@@ -1,3 +1,4 @@
 SUBDIRS = \
 	hlr \
+	mslookup \
 	$(NULL)