diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 0291c055f74ae323f558b1b1e078c926e5aec11d..e8d1ac32f8945fd4aee2958e3c0e5ed51af02e84 100644
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -10138,7 +10138,7 @@ static void *pri_dchannel(void *vpri)
 									pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset, pri->span, (int)e->hangup.aoc_units, (e->hangup.aoc_units == 1) ? "" : "s");
 
 #ifdef SUPPORT_USERUSER
-						if (!ast_strlen_zero(e->hangup.useruserinfo)) {
+						if (pri->pvts[chanpos]->owner && !ast_strlen_zero(e->hangup.useruserinfo)) {
 							pbx_builtin_setvar_helper(pri->pvts[chanpos]->owner, "USERUSERINFO", e->hangup.useruserinfo);
 						}
 #endif