Index: main/channel.c
===================================================================
--- main/channel.c	(revision 274241)
+++ main/channel.c	(working copy)
@@ -2894,8 +2894,12 @@
 		a.subclass = chan->rawwriteformat;
 		a.data = nothing + AST_FRIENDLY_OFFSET;
 		a.src = "ast_prod";
-		if (ast_write(chan, &a))
+		/* currently ast_prod is only called once where we know the flag is already set */
+		ast_clear_flag(chan, AST_FLAG_WRITE_INT);     
+		if (ast_write(chan, &a)) {
 			ast_log(LOG_WARNING, "Prodding channel '%s' failed\n", chan->name);
+		}
+		ast_set_flag(chan, AST_FLAG_WRITE_INT);     
 	}
 	return 0;
 }