Index: res/res_musiconhold.c
===================================================================
--- res/res_musiconhold.c	(revision 344438)
+++ res/res_musiconhold.c	(working copy)
@@ -1502,6 +1502,13 @@
 		return -1;
 	}
 
+	if (ast_test_flag(global_flags, MOH_CACHERTCLASSES) && mohclass->realtime && !strcasecmp(mohclass->mode, "files")) {
+		if (!moh_scan_files(mohclass)) {
+			mohclass = mohclass_unref(mohclass, "unreffing potential mohclass (moh_scan_files failed)");
+			return -1;
+		}
+	}
+
 	ast_manager_event(chan, EVENT_FLAG_CALL, "MusicOnHold",
 		"State: Start\r\n"
 		"Channel: %s\r\n"