diff --git a/src/channels/chan_voicemngr.c b/src/channels/chan_voicemngr.c
index 47d12537fd7748a39f75930f39ce905468471751..4526b99a88b5de711a8c35f7bc7bb849b0bf332e 100644
--- a/src/channels/chan_voicemngr.c
+++ b/src/channels/chan_voicemngr.c
@@ -218,7 +218,7 @@ static void send_outgoing_dtmf(struct ast_channel *owner, char dtmf_button, int
 
 static pthread_t ubus_thread = AST_PTHREADT_NULL;
 
-static struct ubus_context *ctx;
+static struct ubus_context *ctx = NULL;
 static struct ubus_event_handler ObjAddListener; // Event handler for new ubus object events
 static struct ubus_event_handler ObjRmListener;  // Event handler for removed ubus object events