diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index ce88e525571f4bf5cd0914f3a681cc595306bc12..6836db36939ec029e038e1d0d06c97fbe2a2bab4 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -11583,7 +11583,7 @@ static int process_sdp_a_text(const char *a, struct sip_pvt *p, struct ast_rtp_c
 				ast_verbose("Discarded description format %s for ID %u\n", mimeSubtype, codec);
 		}
 	} else if (!strncmp(a, red_fmtp, strlen(red_fmtp))) {
-		char *rest;
+		char *rest = NULL;
 		/* count numbers of generations in fmtp */
 		red_cp = &red_fmtp[strlen(red_fmtp)];
 		strncpy(red_fmtp, a, 100);
diff --git a/pbx/pbx_dundi.c b/pbx/pbx_dundi.c
index 5c36c5a35cb5cbc25523084ad71d56cad8a3f964..83a1f7088e0dfecc8c2dc3e6d4c6207595a2b284 100644
--- a/pbx/pbx_dundi.c
+++ b/pbx/pbx_dundi.c
@@ -3049,7 +3049,7 @@ static char *dundi_show_hints(struct ast_cli_entry *e, int cmd, struct ast_cli_a
 	ast_cli(a->fd, FORMAT2, "Prefix", "Context", "Expiration", "From");
 
 	for (db_entry = db_tree; db_entry; db_entry = db_entry->next) {
-		char *rest;
+		char *rest = NULL;
 
 		if (ast_get_time_t(db_entry->data, &ts, 0, &length)) {
 			continue;