Index: channels/chan_h323.c
===================================================================
--- channels/chan_h323.c	(revision 140020)
+++ channels/chan_h323.c	(working copy)
@@ -3225,7 +3225,7 @@
 		return -1;
 	}
 	if (!ast_mutex_lock(&monlock)) {
-		if ((monitor_thread != AST_PTHREADT_STOP) && (monitor_thread != AST_PTHREADT_NULL)) {
+		if (!pthread_equal(monitor_thread, AST_PTHREADT_STOP) && !pthread_equal(monitor_thread, AST_PTHREADT_NULL)) {
 			/* this causes a seg, anyone know why? */
 			if (monitor_thread != pthread_self())
 				pthread_cancel(monitor_thread);