diff --git a/dlls/jscript/engine.c b/dlls/jscript/engine.c
index 65eeaf72107..6f5beb4ab83 100644
--- a/dlls/jscript/engine.c
+++ b/dlls/jscript/engine.c
@@ -1993,11 +1993,25 @@ HRESULT equal2_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWORD flags
     return return_bool(ret, b);
 }
 
+/* ECMA-262 3rd Edition    11.9.2 */
 HRESULT not_equal_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
 {
+    binary_expression_t *expr = (binary_expression_t*)_expr;
+    VARIANT rval, lval;
+    BOOL b;
+    HRESULT hres;
 
-    FIXME("\n");
-    return E_NOTIMPL;
+    TRACE("\n");
+
+    hres = get_binary_expr_values(ctx, expr, ei, &lval, &rval);
+    if(FAILED(hres))
+        return hres;
+
+    hres = equal_values(ctx, &lval, &rval, ei, &b);
+    if(FAILED(hres))
+        return hres;
+
+    return return_bool(ret, !b);
 }
 
 /* ECMA-262 3rd Edition    11.9.5 */
diff --git a/dlls/jscript/tests/lang.js b/dlls/jscript/tests/lang.js
index c231180f3ab..5f9848e368a 100644
--- a/dlls/jscript/tests/lang.js
+++ b/dlls/jscript/tests/lang.js
@@ -49,6 +49,9 @@ ok(true == 1, "true == 1 is false");
 ok(!(true == 2), "true == 2");
 ok(0 == false, "0 == false is false");
 
+ok(1 != 2, "1 != 2 is false");
+ok(false != 1, "false != 1 is false");
+
 var trueVar = true;
 ok(trueVar, "trueVar is not true");