diff --git a/dlls/user32/winstation.c b/dlls/user32/winstation.c
index ab1beed3c32..98afc499234 100644
--- a/dlls/user32/winstation.c
+++ b/dlls/user32/winstation.c
@@ -253,31 +253,20 @@ HDESK WINAPI CreateDesktopA( LPCSTR name, LPCSTR device, LPDEVMODEA devmode,
 HDESK WINAPI CreateDesktopW( LPCWSTR name, LPCWSTR device, LPDEVMODEW devmode,
                              DWORD flags, ACCESS_MASK access, LPSECURITY_ATTRIBUTES sa )
 {
-    HANDLE ret;
-    DWORD len = name ? lstrlenW(name) : 0;
+    OBJECT_ATTRIBUTES attr;
+    UNICODE_STRING str;
 
     if (device || devmode)
     {
         SetLastError( ERROR_INVALID_PARAMETER );
         return 0;
     }
-    if (len >= MAX_PATH)
-    {
-        SetLastError( ERROR_FILENAME_EXCED_RANGE );
-        return 0;
-    }
-    SERVER_START_REQ( create_desktop )
-    {
-        req->flags      = flags;
-        req->access     = access;
-        req->attributes = OBJ_CASE_INSENSITIVE | OBJ_OPENIF |
-                          ((sa && sa->bInheritHandle) ? OBJ_INHERIT : 0);
-        wine_server_add_data( req, name, len * sizeof(WCHAR) );
-        wine_server_call_err( req );
-        ret = wine_server_ptr_handle( reply->handle );
-    }
-    SERVER_END_REQ;
-    return ret;
+
+    RtlInitUnicodeString( &str, name );
+    InitializeObjectAttributes( &attr, &str, OBJ_CASE_INSENSITIVE | OBJ_OPENIF,
+                                get_winstations_dir_handle(), NULL );
+    if (sa && sa->bInheritHandle) attr.Attributes |= OBJ_INHERIT;
+    return NtUserCreateDesktopEx( &attr, NULL, devmode, flags, access, 0 );
 }
 
 
diff --git a/dlls/win32u/syscall.c b/dlls/win32u/syscall.c
index e8c904f9f02..b4d5d718bf5 100644
--- a/dlls/win32u/syscall.c
+++ b/dlls/win32u/syscall.c
@@ -96,6 +96,7 @@ static void * const syscalls[] =
     NtGdiTransformPoints,
     NtUserCloseDesktop,
     NtUserCloseWindowStation,
+    NtUserCreateDesktopEx,
     NtUserCreateWindowStation,
     NtUserGetObjectInformation,
     NtUserGetProcessWindowStation,
diff --git a/dlls/win32u/win32u.spec b/dlls/win32u/win32u.spec
index 860b3626931..bb800830f3d 100644
--- a/dlls/win32u/win32u.spec
+++ b/dlls/win32u/win32u.spec
@@ -809,7 +809,7 @@
 @ stub NtUserCreateActivationObject
 @ stub NtUserCreateCaret
 @ stub NtUserCreateDCompositionHwndTarget
-@ stub NtUserCreateDesktopEx
+@ stdcall -syscall NtUserCreateDesktopEx(ptr ptr ptr long long long)
 @ stub NtUserCreateEmptyCursorObject
 @ stub NtUserCreateInputContext
 @ stub NtUserCreateLocalMemHandle
diff --git a/dlls/win32u/winstation.c b/dlls/win32u/winstation.c
index bd8420df05f..0d0eefcf629 100644
--- a/dlls/win32u/winstation.c
+++ b/dlls/win32u/winstation.c
@@ -127,6 +127,38 @@ BOOL WINAPI NtUserSetProcessWindowStation( HWINSTA handle )
     return ret;
 }
 
+/***********************************************************************
+ *           NtUserCreateDesktopEx   (win32u.@)
+ */
+HDESK WINAPI NtUserCreateDesktopEx( OBJECT_ATTRIBUTES *attr, UNICODE_STRING *device,
+                                    DEVMODEW *devmode, DWORD flags, ACCESS_MASK access,
+                                    ULONG heap_size )
+{
+    HANDLE ret;
+
+    if ((device && device->Length) || devmode)
+    {
+        SetLastError( ERROR_INVALID_PARAMETER );
+        return 0;
+    }
+    if (attr->ObjectName->Length >= MAX_PATH * sizeof(WCHAR))
+    {
+        SetLastError( ERROR_FILENAME_EXCED_RANGE );
+        return 0;
+    }
+    SERVER_START_REQ( create_desktop )
+    {
+        req->flags      = flags;
+        req->access     = access;
+        req->attributes = attr->Attributes;
+        wine_server_add_data( req, attr->ObjectName->Buffer, attr->ObjectName->Length );
+        wine_server_call_err( req );
+        ret = wine_server_ptr_handle( reply->handle );
+    }
+    SERVER_END_REQ;
+    return ret;
+}
+
 /***********************************************************************
  *           NtUserCloseDesktop  (win32u.@)
  */
diff --git a/dlls/wow64win/syscall.h b/dlls/wow64win/syscall.h
index 371ce3665fd..a1dc08103d4 100644
--- a/dlls/wow64win/syscall.h
+++ b/dlls/wow64win/syscall.h
@@ -83,6 +83,7 @@
     SYSCALL_ENTRY( NtGdiTransformPoints ) \
     SYSCALL_ENTRY( NtUserCloseDesktop ) \
     SYSCALL_ENTRY( NtUserCloseWindowStation ) \
+    SYSCALL_ENTRY( NtUserCreateDesktopEx ) \
     SYSCALL_ENTRY( NtUserCreateWindowStation ) \
     SYSCALL_ENTRY( NtUserGetProcessWindowStation ) \
     SYSCALL_ENTRY( NtUserGetThreadDesktop ) \
diff --git a/dlls/wow64win/user.c b/dlls/wow64win/user.c
index 80e85f8a631..b20ff3f887b 100644
--- a/dlls/wow64win/user.c
+++ b/dlls/wow64win/user.c
@@ -73,6 +73,25 @@ NTSTATUS WINAPI wow64_NtUserSetProcessWindowStation( UINT *args )
     return NtUserSetProcessWindowStation( handle );
 }
 
+NTSTATUS WINAPI wow64_NtUserCreateDesktopEx( UINT *args )
+{
+    OBJECT_ATTRIBUTES32 *attr32 = get_ptr( &args );
+    UNICODE_STRING32 *device32 = get_ptr( &args );
+    DEVMODEW *devmode = get_ptr( &args );
+    DWORD flags = get_ulong( &args );
+    ACCESS_MASK access = get_ulong( &args );
+    ULONG heap_size = get_ulong( &args );
+
+    struct object_attr64 attr;
+    UNICODE_STRING device;
+    HANDLE ret;
+
+    ret = NtUserCreateDesktopEx( objattr_32to64( &attr, attr32 ),
+                                 unicode_str_32to64( &device, device32 ),
+                                 devmode, flags, access, heap_size );
+    return HandleToUlong( ret );
+}
+
 NTSTATUS WINAPI wow64_NtUserCloseDesktop( UINT *args )
 {
     HDESK handle = get_handle( &args );
diff --git a/include/ntuser.h b/include/ntuser.h
index 648d4a3350d..8687a6bbc59 100644
--- a/include/ntuser.h
+++ b/include/ntuser.h
@@ -20,10 +20,14 @@
 #define _NTUSER_
 
 #include <winuser.h>
+#include <wingdi.h>
 #include <winternl.h>
 
 BOOL    WINAPI NtUserCloseDesktop( HDESK handle );
 BOOL    WINAPI NtUserCloseWindowStation( HWINSTA handle );
+HDESK   WINAPI NtUserCreateDesktopEx( OBJECT_ATTRIBUTES *attr, UNICODE_STRING *device,
+                                      DEVMODEW *devmode, DWORD flags, ACCESS_MASK access,
+                                      ULONG heap_size );
 HWINSTA WINAPI NtUserCreateWindowStation( OBJECT_ATTRIBUTES *attr, ACCESS_MASK mask, ULONG arg3,
                                           ULONG arg4, ULONG arg5, ULONG arg6, ULONG arg7 );
 BOOL    WINAPI NtUserGetObjectInformation( HANDLE handle, INT index, void *info,