diff --git a/js/src/jit-test/tests/auto-regress/bug1263857.js b/js/src/jit-test/tests/auto-regress/bug1263857.js
index 26920980822d..906e92740e09 100644
--- a/js/src/jit-test/tests/auto-regress/bug1263857.js
+++ b/js/src/jit-test/tests/auto-regress/bug1263857.js
@@ -1,7 +1,4 @@
-// Disabled doe to frequent timeout on Windows xp debug Jittest.
-/*
-// |jit- test| allow-oom; allow-unhandlable-oom
+// |jit-test| allow-oom; allow-unhandlable-oom
 gcparam("maxBytes", gcparam("gcBytes") + 1);
 fullcompartmentchecks(true);
 /x/g[Symbol.replace]("        x".repeat(32768), "");
-*/