diff --git a/dlls/jscript/engine.c b/dlls/jscript/engine.c
index 76e8830e7d7..cb2618b7c0b 100644
--- a/dlls/jscript/engine.c
+++ b/dlls/jscript/engine.c
@@ -2478,8 +2478,12 @@ HRESULT assign_or_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWORD fl
     return assign_oper_eval(ctx, expr->expression1, expr->expression2, bitor_eval, ei, ret);
 }
 
-HRESULT assign_xor_expression_eval(exec_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
+/* ECMA-262 3rd Edition    11.13.2 */
+HRESULT assign_xor_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    binary_expression_t *expr = (binary_expression_t*)_expr;
+
+    TRACE("\n");
+
+    return assign_oper_eval(ctx, expr->expression1, expr->expression2, xor_eval, ei, ret);
 }
diff --git a/dlls/jscript/tests/lang.js b/dlls/jscript/tests/lang.js
index dd7c9fd2c87..d57598ddc12 100644
--- a/dlls/jscript/tests/lang.js
+++ b/dlls/jscript/tests/lang.js
@@ -297,6 +297,10 @@ tmp = 0xf0f0^0xff00;
 ok(tmp === 0x0ff0, "0xf0f0^0xff00 !== 0x0ff0");
 ok(getVT(tmp) === "VT_I4", "getVT(0xf0f0^0xff00) = " + getVT(tmp));
 
+tmp = 5;
+ok((tmp ^= 3) === 6, "tmp(5) ^= 3 !== 6");
+ok(getVT(tmp) === "VT_I4", "getVT(tmp ^= 3) = " + getVT(tmp));
+
 ok(1 < 3.4, "1 < 3.4 failed");
 ok(!(3.4 < 1), "3.4 < 1");
 ok("abc" < "abcd", "abc < abcd failed");