diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 78444c39a6..77ebf5a3be 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -2171,7 +2171,7 @@ static void __sip_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
 	}
 	ast_mutex_unlock(&p->lock);
 	if (option_debug)
-		ast_log(LOG_DEBUG, "Stopping retransmission on '%s' of %s %d: Match %s\n", p->callid, resp ? "Response" : "Request", seqno, res ? "Not Found" : "Found");
+		ast_log(LOG_DEBUG, "Stopping retransmission on '%s' of %s %d: Match %s\n", p->callid, resp ? "Response" : "Request", seqno, res == FALSE ? "Not Found" : "Found");
 }
 
 /*! \brief Pretend to ack all packets
@@ -2212,7 +2212,7 @@ static int __sip_semi_ack(struct sip_pvt *p, int seqno, int resp, int sipmethod)
 		}
 	}
 	if (option_debug)
-		ast_log(LOG_DEBUG, "(Provisional) Stopping retransmission (but retaining packet) on '%s' %s %d: %s\n", p->callid, resp ? "Response" : "Request", seqno, res ? "Not Found" : "Found");
+		ast_log(LOG_DEBUG, "(Provisional) Stopping retransmission (but retaining packet) on '%s' %s %d: %s\n", p->callid, resp ? "Response" : "Request", seqno, res == -1 ? "Not Found" : "Found");
 	return res;
 }