diff --git a/src/hlua.c b/src/hlua.c
index 5f5b2c3..a2dde4b 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -3213,22 +3213,13 @@
 __LJMP static int hlua_channel_is_full(lua_State *L)
 {
 	struct channel *chn;
-	int rem;
 
 	MAY_LJMP(check_args(L, 1, "is_full"));
 	chn = MAY_LJMP(hlua_checkchannel(L, 1));
-
-	if (IS_HTX_STRM(chn_strm(chn))) {
-		struct htx *htx = htxbuf(&chn->buf);
-
-		rem = htx_free_data_space(htx);
-	}
-	else
-		rem = b_room(&chn->buf);
-
-	rem -= global.tune.maxrewrite; /* Rewrite reserved size */
-
-	lua_pushboolean(L, rem <= 0);
+	/* ignore the reserve, we are not on a producer side (ie in an
+	 * applet).
+	 */
+	lua_pushboolean(L, channel_full(chn, 0));
 	return 1;
 }