diff --git a/dlls/crtdll/crtdll.spec b/dlls/crtdll/crtdll.spec
index 45491455d09..aae66d828cc 100644
--- a/dlls/crtdll/crtdll.spec
+++ b/dlls/crtdll/crtdll.spec
@@ -504,7 +504,7 @@
 @ cdecl vsprintf(ptr str ptr) MSVCRT_vsprintf
 @ cdecl vswprintf(ptr wstr ptr) MSVCRT_vswprintf
 @ cdecl vwprintf(wstr ptr) MSVCRT_vwprintf
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
 @ cdecl wcscoll(wstr wstr) MSVCRT_wcscoll
diff --git a/dlls/msvcr100/msvcr100.spec b/dlls/msvcr100/msvcr100.spec
index e37c0dbe5e4..68d1ee3f0f3 100644
--- a/dlls/msvcr100/msvcr100.spec
+++ b/dlls/msvcr100/msvcr100.spec
@@ -1854,7 +1854,7 @@
 @ cdecl vwprintf_s(wstr ptr) MSVCRT_vwprintf_s
 @ cdecl wcrtomb(ptr long ptr) MSVCRT_wcrtomb
 @ cdecl wcrtomb_s(ptr ptr long long ptr) MSVCRT_wcrtomb_s
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcscat_s(wstr long wstr) MSVCRT_wcscat_s
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
diff --git a/dlls/msvcr110/msvcr110.spec b/dlls/msvcr110/msvcr110.spec
index 8f1d9f93970..13abe6ad64b 100644
--- a/dlls/msvcr110/msvcr110.spec
+++ b/dlls/msvcr110/msvcr110.spec
@@ -2212,7 +2212,7 @@
 @ cdecl vwprintf_s(wstr ptr) MSVCRT_vwprintf_s
 @ cdecl wcrtomb(ptr long ptr) MSVCRT_wcrtomb
 @ cdecl wcrtomb_s(ptr ptr long long ptr) MSVCRT_wcrtomb_s
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcscat_s(wstr long wstr) MSVCRT_wcscat_s
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
diff --git a/dlls/msvcr120/msvcr120.spec b/dlls/msvcr120/msvcr120.spec
index 731e001ac22..7181184938f 100644
--- a/dlls/msvcr120/msvcr120.spec
+++ b/dlls/msvcr120/msvcr120.spec
@@ -2447,7 +2447,7 @@
 @ stub vwscanf_s
 @ cdecl wcrtomb(ptr long ptr) MSVCRT_wcrtomb
 @ cdecl wcrtomb_s(ptr ptr long long ptr) MSVCRT_wcrtomb_s
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcscat_s(wstr long wstr) MSVCRT_wcscat_s
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
diff --git a/dlls/msvcr70/msvcr70.spec b/dlls/msvcr70/msvcr70.spec
index 2aa111cab50..d4114a24fef 100644
--- a/dlls/msvcr70/msvcr70.spec
+++ b/dlls/msvcr70/msvcr70.spec
@@ -850,7 +850,7 @@
 @ cdecl vsprintf(ptr str ptr) MSVCRT_vsprintf
 @ cdecl vswprintf(ptr wstr ptr) MSVCRT_vswprintf
 @ cdecl vwprintf(wstr ptr) MSVCRT_vwprintf
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
 @ cdecl wcscoll(wstr wstr) MSVCRT_wcscoll
diff --git a/dlls/msvcr71/msvcr71.spec b/dlls/msvcr71/msvcr71.spec
index da6827789ef..c1b1c68f1f5 100644
--- a/dlls/msvcr71/msvcr71.spec
+++ b/dlls/msvcr71/msvcr71.spec
@@ -846,7 +846,7 @@
 @ cdecl vsprintf(ptr str ptr) MSVCRT_vsprintf
 @ cdecl vswprintf(ptr wstr ptr) MSVCRT_vswprintf
 @ cdecl vwprintf(wstr ptr) MSVCRT_vwprintf
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
 @ cdecl wcscoll(wstr wstr) MSVCRT_wcscoll
diff --git a/dlls/msvcr80/msvcr80.spec b/dlls/msvcr80/msvcr80.spec
index 1847a93c71f..916245cb269 100644
--- a/dlls/msvcr80/msvcr80.spec
+++ b/dlls/msvcr80/msvcr80.spec
@@ -1534,7 +1534,7 @@
 @ cdecl vwprintf_s(wstr ptr) MSVCRT_vwprintf_s
 @ cdecl wcrtomb(ptr long ptr) MSVCRT_wcrtomb
 @ cdecl wcrtomb_s(ptr ptr long long ptr) MSVCRT_wcrtomb_s
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcscat_s(wstr long wstr) MSVCRT_wcscat_s
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
diff --git a/dlls/msvcr90/msvcr90.spec b/dlls/msvcr90/msvcr90.spec
index 8a53cf47a56..b2967858bc0 100644
--- a/dlls/msvcr90/msvcr90.spec
+++ b/dlls/msvcr90/msvcr90.spec
@@ -1507,7 +1507,7 @@
 @ cdecl vwprintf_s(wstr ptr) MSVCRT_vwprintf_s
 @ cdecl wcrtomb(ptr long ptr) MSVCRT_wcrtomb
 @ cdecl wcrtomb_s(ptr ptr long long ptr) MSVCRT_wcrtomb_s
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcscat_s(wstr long wstr) MSVCRT_wcscat_s
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
diff --git a/dlls/msvcrt/msvcrt.h b/dlls/msvcrt/msvcrt.h
index 7e854704b10..7449cbb2de6 100644
--- a/dlls/msvcrt/msvcrt.h
+++ b/dlls/msvcrt/msvcrt.h
@@ -1210,6 +1210,7 @@ int __cdecl MSVCRT__iswlower_l(MSVCRT_wchar_t, MSVCRT__locale_t);
 int __cdecl MSVCRT__iswupper_l(MSVCRT_wchar_t, MSVCRT__locale_t);
 int __cdecl MSVCRT__iswprint_l(MSVCRT_wchar_t, MSVCRT__locale_t);
 int __cdecl MSVCRT__iswpunct_l(MSVCRT_wchar_t, MSVCRT__locale_t);
+MSVCRT_size_t __cdecl MSVCRT_wcslen(const MSVCRT_wchar_t*);
 
 /* Maybe one day we'll enable the invalid parameter handlers with the full set of information (msvcrXXd)
  *      #define MSVCRT_INVALID_PMT(x) MSVCRT_call_invalid_parameter_handler(x, __FUNCTION__, __FILE__, __LINE__, 0)
diff --git a/dlls/msvcrt/msvcrt.spec b/dlls/msvcrt/msvcrt.spec
index ac1269c53f8..51ecb095db0 100644
--- a/dlls/msvcrt/msvcrt.spec
+++ b/dlls/msvcrt/msvcrt.spec
@@ -1481,7 +1481,7 @@
 @ cdecl vwprintf_s(wstr ptr) MSVCRT_vwprintf_s
 @ cdecl wcrtomb(ptr long ptr) MSVCRT_wcrtomb
 @ cdecl wcrtomb_s(ptr ptr long long ptr) MSVCRT_wcrtomb_s
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcscat_s(wstr long wstr) MSVCRT_wcscat_s
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
diff --git a/dlls/msvcrt/wcs.c b/dlls/msvcrt/wcs.c
index b553f27d276..31ec0dd33fa 100644
--- a/dlls/msvcrt/wcs.c
+++ b/dlls/msvcrt/wcs.c
@@ -2255,6 +2255,15 @@ INT CDECL MSVCRT_wcscat_s(MSVCRT_wchar_t* dst, MSVCRT_size_t elem, const MSVCRT_
     return MSVCRT_ERANGE;
 }
 
+/***********************************************************************
+ *           wcscat (MSVCRT.@)
+ */
+MSVCRT_wchar_t* __cdecl MSVCRT_wcscat( MSVCRT_wchar_t *dst, const MSVCRT_wchar_t *src )
+{
+    MSVCRT_wcscpy( dst + MSVCRT_wcslen(dst), src );
+    return dst;
+}
+
 /*********************************************************************
  *  wcsncat_s (MSVCRT.@)
  *
diff --git a/dlls/msvcrtd/msvcrtd.spec b/dlls/msvcrtd/msvcrtd.spec
index 0f6af7cce74..8c775c61a4a 100644
--- a/dlls/msvcrtd/msvcrtd.spec
+++ b/dlls/msvcrtd/msvcrtd.spec
@@ -802,7 +802,7 @@
 @ cdecl vsprintf(ptr str ptr) MSVCRT_vsprintf
 @ cdecl vswprintf(ptr wstr ptr) MSVCRT_vswprintf
 @ cdecl vwprintf(wstr ptr) MSVCRT_vwprintf
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp
 @ cdecl wcscoll(wstr wstr) MSVCRT_wcscoll
diff --git a/dlls/ucrtbase/ucrtbase.spec b/dlls/ucrtbase/ucrtbase.spec
index 2367e5a08d8..25776494210 100644
--- a/dlls/ucrtbase/ucrtbase.spec
+++ b/dlls/ucrtbase/ucrtbase.spec
@@ -2554,7 +2554,7 @@
 @ cdecl ungetwc(long ptr) MSVCRT_ungetwc
 @ cdecl wcrtomb(ptr long ptr) MSVCRT_wcrtomb
 @ cdecl wcrtomb_s(ptr ptr long long ptr) MSVCRT_wcrtomb_s
-@ cdecl wcscat(wstr wstr) ntdll.wcscat
+@ cdecl wcscat(wstr wstr) MSVCRT_wcscat
 @ cdecl wcscat_s(wstr long wstr) MSVCRT_wcscat_s
 @ cdecl wcschr(wstr long) MSVCRT_wcschr
 @ cdecl wcscmp(wstr wstr) MSVCRT_wcscmp