diff --git a/dlls/jscript/bool.c b/dlls/jscript/bool.c
index 14bb1a3944c..d5dfcb49da1 100644
--- a/dlls/jscript/bool.c
+++ b/dlls/jscript/bool.c
@@ -117,6 +117,14 @@ static const builtin_info_t Bool_info = {
     NULL
 };
 
+static const builtin_info_t BoolInst_info = {
+    JSCLASS_BOOLEAN,
+    {NULL, Bool_value, 0},
+    0, NULL,
+    NULL,
+    NULL
+};
+
 static HRESULT BoolConstr_value(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, unsigned argc, VARIANT *argv,
         VARIANT *retv, jsexcept_t *ei)
 {
@@ -168,7 +176,7 @@ static HRESULT alloc_bool(script_ctx_t *ctx, jsdisp_t *object_prototype, BoolIns
     if(object_prototype)
         hres = init_dispex(&bool->dispex, ctx, &Bool_info, object_prototype);
     else
-        hres = init_dispex_from_constr(&bool->dispex, ctx, &Bool_info, ctx->bool_constr);
+        hres = init_dispex_from_constr(&bool->dispex, ctx, &BoolInst_info, ctx->bool_constr);
 
     if(FAILED(hres)) {
         heap_free(bool);
diff --git a/dlls/jscript/tests/api.js b/dlls/jscript/tests/api.js
index 4675e08f888..3d8d67a2642 100644
--- a/dlls/jscript/tests/api.js
+++ b/dlls/jscript/tests/api.js
@@ -217,6 +217,11 @@ ok(Array.prototype.hasOwnProperty('length'), "Array.prototype.hasOwnProperty('le
 ok(!obj.hasOwnProperty('sort'), "obj.hasOwnProperty('sort') is true");
 ok(obj.hasOwnProperty('length'), "obj.hasOwnProperty('length') is true");
 
+obj = new Boolean(false);
+ok(!obj.hasOwnProperty('toString'), "obj.hasOwnProperty('toString') is true");
+ok(!Boolean.hasOwnProperty('toString'), "Boolean.hasOwnProperty('toString') is true");
+ok(Boolean.prototype.hasOwnProperty('toString'), "Boolean.prototype.hasOwnProperty('toString') is false");
+
 tmp = "" + new Object();
 ok(tmp === "[object Object]", "'' + new Object() = " + tmp);
 (tmp = new Array).f = Object.prototype.toString;