diff --git a/src/libcommon/gsm_data.c b/src/libcommon/gsm_data.c
index 92ebbfe..3b63ad0 100644
--- a/src/libcommon/gsm_data.c
+++ b/src/libcommon/gsm_data.c
@@ -39,7 +39,7 @@
 #include <osmocom/bsc/abis_nm.h>
 #include <osmocom/bsc/handover_cfg.h>
 
-void *tall_bsc_ctx;
+void *tall_bsc_ctx = NULL;
 
 static LLIST_HEAD(bts_models);