diff --git a/src/Makefile.am b/src/Makefile.am
index ea5023d..646fd34 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -30,6 +30,7 @@
 	ctrl.h \
 	hlr_vty.h \
 	hlr_vty_subscr.h \
+	hlr_ss_ussd.h \
 	db_bootstrap.h \
 	$(NULL)
 
@@ -53,6 +54,7 @@
 	hlr_vty.c \
 	hlr_vty_subscr.c \
 	gsup_send.c \
+	hlr_ss_ussd.c \
 	$(NULL)
 
 osmo_hlr_LDADD = \