Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 140020)
+++ channels/chan_sip.c	(working copy)
@@ -17217,6 +17217,10 @@
 				ast_log(LOG_WARNING, "Qualification of peer '%s' should be 'yes', 'no', or a number of milliseconds at line %d of sip.conf\n", peer->name, v->lineno);
 				peer->maxms = 0;
 			}
+			if (realtime && !ast_test_flag(&global_flags[1], SIP_PAGE2_RTCACHEFRIENDS) && peer->maxms > 0) {
+				ast_log(LOG_WARNING, "Qualify is incompatible with dynamic uncached realtime.  Please either turn rtcachefriends on or turn qualify off on peer '%s'\n", peer->name);
+				peer->maxms = 0;
+			}
 		} else if (!strcasecmp(v->name, "maxcallbitrate")) {
 			peer->maxcallbitrate = atoi(v->value);
 			if (peer->maxcallbitrate < 0)