diff --git a/dlls/msvcp100/locale.c b/dlls/msvcp100/locale.c
index 1bba8341c37..55b31348307 100644
--- a/dlls/msvcp100/locale.c
+++ b/dlls/msvcp100/locale.c
@@ -8104,8 +8104,23 @@ locale__Locimp* __cdecl locale__Init(void)
 DEFINE_THISCALL_WRAPPER(locale_ctor_locale_locale, 16)
 locale* __thiscall locale_ctor_locale_locale(locale *this, const locale *loc, const locale *other, category cat)
 {
-    FIXME("(%p %p %p %d) stub\n", this, loc, other, cat);
-    return NULL;
+    _Locinfo locinfo;
+
+    TRACE("(%p %p %p %d)\n", this, loc, other, cat);
+
+    this->ptr = MSVCRT_operator_new(sizeof(locale__Locimp));
+    if(!this->ptr) {
+        ERR("Out of memory\n");
+        throw_exception(EXCEPTION_BAD_ALLOC, NULL);
+    }
+    locale__Locimp_copy_ctor(this->ptr, loc->ptr);
+
+    _Locinfo_ctor_cat_cstr(&locinfo, loc->ptr->catmask, MSVCP_basic_string_char_c_str(&loc->ptr->name));
+    _Locinfo__Addcats(&locinfo, cat & other->ptr->catmask, MSVCP_basic_string_char_c_str(&other->ptr->name));
+    locale__Locimp__Makeloc(&locinfo, cat, this->ptr, other);
+    _Locinfo_dtor(&locinfo);
+
+    return this;
 }
 
 /* ??0locale@std@@QAE@ABV01@@Z */
diff --git a/dlls/msvcp90/locale.c b/dlls/msvcp90/locale.c
index 1d9eb33c588..f5a45343499 100644
--- a/dlls/msvcp90/locale.c
+++ b/dlls/msvcp90/locale.c
@@ -8255,8 +8255,23 @@ locale__Locimp* __cdecl locale__Init(void)
 DEFINE_THISCALL_WRAPPER(locale_ctor_locale_locale, 16)
 locale* __thiscall locale_ctor_locale_locale(locale *this, const locale *loc, const locale *other, category cat)
 {
-    FIXME("(%p %p %p %d) stub\n", this, loc, other, cat);
-    return NULL;
+    _Locinfo locinfo;
+
+    TRACE("(%p %p %p %d)\n", this, loc, other, cat);
+
+    this->ptr = MSVCRT_operator_new(sizeof(locale__Locimp));
+    if(!this->ptr) {
+        ERR("Out of memory\n");
+        throw_exception(EXCEPTION_BAD_ALLOC, NULL);
+    }
+    locale__Locimp_copy_ctor(this->ptr, loc->ptr);
+
+    _Locinfo_ctor_cat_cstr(&locinfo, loc->ptr->catmask, MSVCP_basic_string_char_c_str(&loc->ptr->name));
+    _Locinfo__Addcats(&locinfo, cat & other->ptr->catmask, MSVCP_basic_string_char_c_str(&other->ptr->name));
+    locale__Locimp__Makeloc(&locinfo, cat, this->ptr, other);
+    _Locinfo_dtor(&locinfo);
+
+    return this;
 }
 
 /* ??0locale@std@@QAE@ABV01@@Z */