diff --git a/openbsc/src/libgb/common_vty.h b/openbsc/src/libgb/common_vty.h
index a278266..8c6b9ab 100644
--- a/openbsc/src/libgb/common_vty.h
+++ b/openbsc/src/libgb/common_vty.h
@@ -1,4 +1,7 @@
 #include <osmocom/vty/command.h>
+#include <osmocom/core/logging.h>
+
+extern int DNS, DBSSGP;
 
 extern struct cmd_element libgb_exit_cmd;
 extern struct cmd_element libgb_end_cmd;