diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index b61052966d..ff95e2d828 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -14147,7 +14147,7 @@ static int acf_channel_read(struct ast_channel *chan, char *funcname, char *prep
 		return 0;
 	}
 
-	if (!strcasecmp(args.param, "rtpqos"))
+	if (strcasecmp(args.param, "rtpqos"))
 		return 0;
 
 	memset(buf, 0, buflen);