diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index b6f169f04afa80b552ec819d9151cf7de4fae29a..01cca054292440a0cf5905049f579a412540d150 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -5912,7 +5912,7 @@ static struct ast_frame *sip_read(struct ast_channel *ast)
 	}
 
 	/* Only allow audio through if they sent progress with SDP, or if the channel is actually answered */
-	if (fr->frametype == AST_FRAME_VOICE && p->invitestate != INV_EARLY_MEDIA && ast->_state != AST_STATE_UP) {
+	if (fr && fr->frametype == AST_FRAME_VOICE && p->invitestate != INV_EARLY_MEDIA && ast->_state != AST_STATE_UP) {
 		fr = &ast_null_frame;
 	}