diff --git a/dlls/msvcp110/msvcp110.spec b/dlls/msvcp110/msvcp110.spec
index c5d438a73e5..858af320f6d 100644
--- a/dlls/msvcp110/msvcp110.spec
+++ b/dlls/msvcp110/msvcp110.spec
@@ -1208,8 +1208,8 @@
 @ cdecl -arch=win64 ?_Ffmt@?$num_put@_WV?$ostreambuf_iterator@_WU?$char_traits@_W@std@@@std@@@std@@AEBAPEADPEADDH@Z(ptr ptr long long) num_put_wchar__Ffmt
 @ cdecl -ret64 -arch=win32 ?_File_size@sys@tr2@std@@YA_KPBD@Z(str) tr2_sys__File_size
 @ cdecl -ret64 -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEBD@Z(str) tr2_sys__File_size
-@ stub -arch=win32 ?_File_size@sys@tr2@std@@YA_KPB_W@Z
-@ stub -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEB_W@Z
+@ cdecl -arch=win32 ?_File_size@sys@tr2@std@@YA_KPB_W@Z(wstr) tr2_sys__File_size_wchar
+@ cdecl -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEB_W@Z(wstr) tr2_sys__File_size_wchar
 @ cdecl -arch=arm ?_Findarr@ios_base@std@@AAAAAU_Iosarray@12@H@Z(ptr long) ios_base_Findarr
 @ thiscall -arch=i386 ?_Findarr@ios_base@std@@AAEAAU_Iosarray@12@H@Z(ptr long) ios_base_Findarr
 @ cdecl -arch=win64 ?_Findarr@ios_base@std@@AEAAAEAU_Iosarray@12@H@Z(ptr long) ios_base_Findarr
diff --git a/dlls/msvcp120/msvcp120.spec b/dlls/msvcp120/msvcp120.spec
index e9a72177a52..430690c14ca 100644
--- a/dlls/msvcp120/msvcp120.spec
+++ b/dlls/msvcp120/msvcp120.spec
@@ -1173,8 +1173,8 @@
 @ cdecl -arch=win64 ?_Ffmt@?$num_put@_WV?$ostreambuf_iterator@_WU?$char_traits@_W@std@@@std@@@std@@AEBAPEADPEADDH@Z(ptr ptr long long) num_put_wchar__Ffmt
 @ cdecl -ret64 -arch=win32 ?_File_size@sys@tr2@std@@YA_KPBD@Z(str) tr2_sys__File_size
 @ cdecl -ret64 -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEBD@Z(str) tr2_sys__File_size
-@ stub -arch=win32 ?_File_size@sys@tr2@std@@YA_KPB_W@Z
-@ stub -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEB_W@Z
+@ cdecl -arch=win32 ?_File_size@sys@tr2@std@@YA_KPB_W@Z(wstr) tr2_sys__File_size_wchar
+@ cdecl -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEB_W@Z(wstr) tr2_sys__File_size_wchar
 @ cdecl -arch=arm ?_Findarr@ios_base@std@@AAAAAU_Iosarray@12@H@Z(ptr long) ios_base_Findarr
 @ thiscall -arch=i386 ?_Findarr@ios_base@std@@AAEAAU_Iosarray@12@H@Z(ptr long) ios_base_Findarr
 @ cdecl -arch=win64 ?_Findarr@ios_base@std@@AEAAAEAU_Iosarray@12@H@Z(ptr long) ios_base_Findarr
diff --git a/dlls/msvcp120/tests/msvcp120.c b/dlls/msvcp120/tests/msvcp120.c
index 1a53bee9ab3..f2fdd92da73 100644
--- a/dlls/msvcp120/tests/msvcp120.c
+++ b/dlls/msvcp120/tests/msvcp120.c
@@ -73,6 +73,7 @@ static void (CDECL *p__Do_call)(void *this);
 
 /* filesystem */
 static ULONGLONG(__cdecl *p_tr2_sys__File_size)(char const*);
+static ULONGLONG(__cdecl *p_tr2_sys__File_size_wchar)(WCHAR const*);
 static int (__cdecl *p_tr2_sys__Equivalent)(char const*, char const*);
 static char* (__cdecl *p_tr2_sys__Current_get)(char *);
 static MSVCP_bool (__cdecl *p_tr2_sys__Current_set)(char const*);
@@ -113,6 +114,8 @@ static BOOL init(void)
     if(sizeof(void*) == 8) { /* 64-bit initialization */
         SET(p_tr2_sys__File_size,
                 "?_File_size@sys@tr2@std@@YA_KPEBD@Z");
+        SET(p_tr2_sys__File_size_wchar,
+                "?_File_size@sys@tr2@std@@YA_KPEB_W@Z");
         SET(p_tr2_sys__Equivalent,
                 "?_Equivalent@sys@tr2@std@@YAHPEBD0@Z");
         SET(p_tr2_sys__Current_get,
@@ -136,6 +139,8 @@ static BOOL init(void)
     } else {
         SET(p_tr2_sys__File_size,
                 "?_File_size@sys@tr2@std@@YA_KPBD@Z");
+        SET(p_tr2_sys__File_size_wchar,
+                "?_File_size@sys@tr2@std@@YA_KPB_W@Z");
         SET(p_tr2_sys__Equivalent,
                 "?_Equivalent@sys@tr2@std@@YAHPBD0@Z");
         SET(p_tr2_sys__Current_get,
@@ -367,6 +372,7 @@ static void test_tr2_sys__File_size(void)
     ULONGLONG val;
     HANDLE file;
     LARGE_INTEGER file_size;
+    WCHAR testW[] = {'t','r','2','_','t','e','s','t','_','d','i','r','/','f','1',0};
     CreateDirectoryA("tr2_test_dir", NULL);
 
     file = CreateFileA("tr2_test_dir/f1", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL);
@@ -377,6 +383,8 @@ static void test_tr2_sys__File_size(void)
     CloseHandle(file);
     val = p_tr2_sys__File_size("tr2_test_dir/f1");
     ok(val == 7, "file_size is %s\n", debugstr_longlong(val));
+    val = p_tr2_sys__File_size_wchar(testW);
+    ok(val == 7, "file_size is %s\n", debugstr_longlong(val));
 
     file = CreateFileA("tr2_test_dir/f2", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL);
     ok(file != INVALID_HANDLE_VALUE, "create file failed: INVALID_HANDLE_VALUE\n");
@@ -397,9 +405,9 @@ static void test_tr2_sys__File_size(void)
     ok(val == 0, "file_size is %s\n", debugstr_longlong(val));
     ok(errno == 0xdeadbeef, "errno = %d\n", errno);
 
-    ok(DeleteFileA("tr2_test_dir/f1"), "Expected tr2_test_dir/f1 to exist\n");
-    ok(DeleteFileA("tr2_test_dir/f2"), "Expected tr2_test_dir/f2 to exist\n");
-    ok(RemoveDirectoryA("tr2_test_dir"), "Expected tr2_test_dir to exist\n");
+    ok(DeleteFileA("tr2_test_dir/f1"), "expect tr2_test_dir/f1 to exist\n");
+    ok(DeleteFileA("tr2_test_dir/f2"), "expect tr2_test_dir/f2 to exist\n");
+    ok(RemoveDirectoryA("tr2_test_dir"), "expect tr2_test_dir to exist\n");
 }
 
 static void test_tr2_sys__Equivalent(void)
diff --git a/dlls/msvcp120_app/msvcp120_app.spec b/dlls/msvcp120_app/msvcp120_app.spec
index 53dd5480bb3..04585c15ad3 100644
--- a/dlls/msvcp120_app/msvcp120_app.spec
+++ b/dlls/msvcp120_app/msvcp120_app.spec
@@ -1173,8 +1173,8 @@
 @ cdecl -arch=win64 ?_Ffmt@?$num_put@_WV?$ostreambuf_iterator@_WU?$char_traits@_W@std@@@std@@@std@@AEBAPEADPEADDH@Z(ptr ptr long long) msvcp120.?_Ffmt@?$num_put@_WV?$ostreambuf_iterator@_WU?$char_traits@_W@std@@@std@@@std@@AEBAPEADPEADDH@Z
 @ cdecl -ret64 -arch=win32 ?_File_size@sys@tr2@std@@YA_KPBD@Z(str) msvcp120.?_File_size@sys@tr2@std@@YA_KPBD@Z
 @ cdecl -ret64 -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEBD@Z(str) msvcp120.?_File_size@sys@tr2@std@@YA_KPEBD@Z
-@ stub -arch=win32 ?_File_size@sys@tr2@std@@YA_KPB_W@Z
-@ stub -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEB_W@Z
+@ cdecl -arch=win32 ?_File_size@sys@tr2@std@@YA_KPB_W@Z(wstr) msvcp120.?_File_size@sys@tr2@std@@YA_KPB_W@Z
+@ cdecl -arch=win64 ?_File_size@sys@tr2@std@@YA_KPEB_W@Z(wstr) msvcp120.?_File_size@sys@tr2@std@@YA_KPEB_W@Z
 @ cdecl -arch=arm ?_Findarr@ios_base@std@@AAAAAU_Iosarray@12@H@Z(ptr long) msvcp120.?_Findarr@ios_base@std@@AAAAAU_Iosarray@12@H@Z
 @ thiscall -arch=i386 ?_Findarr@ios_base@std@@AAEAAU_Iosarray@12@H@Z(ptr long) msvcp120.?_Findarr@ios_base@std@@AAEAAU_Iosarray@12@H@Z
 @ cdecl -arch=win64 ?_Findarr@ios_base@std@@AEAAAEAU_Iosarray@12@H@Z(ptr long) msvcp120.?_Findarr@ios_base@std@@AEAAAEAU_Iosarray@12@H@Z
diff --git a/dlls/msvcp90/ios.c b/dlls/msvcp90/ios.c
index 006b787a2f4..49a3e4bb9f3 100644
--- a/dlls/msvcp90/ios.c
+++ b/dlls/msvcp90/ios.c
@@ -14204,7 +14204,7 @@ basic_ostream_char* __cdecl basic_ostream_char_print_complex_ldouble(basic_ostre
 
 /* ?_File_size@sys@tr2@std@@YA_KPBD@Z  */
 /* ?_File_size@sys@tr2@std@@YA_KPEBD@Z */
-ULONGLONG __cdecl tr2_sys__File_size(const char* path)
+ULONGLONG __cdecl tr2_sys__File_size(char const* path)
 {
     WIN32_FILE_ATTRIBUTE_DATA fad;
 
@@ -14739,6 +14739,21 @@ void* __thiscall _Winit_ctor(void *this)
     return this;
 }
 
+/* ?_File_size@sys@tr2@std@@YA_KPB_W@Z */
+/* ?_File_size@sys@tr2@std@@YA_KPEB_W@Z */
+ULONGLONG __cdecl tr2_sys__File_size_wchar(WCHAR const* path)
+{
+    WIN32_FILE_ATTRIBUTE_DATA fad;
+
+    TRACE("(%s)\n", debugstr_w(path));
+    if(!GetFileAttributesExW(path, GetFileExInfoStandard, &fad))
+        return 0;
+    if(fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+        return 0;
+
+    return ((ULONGLONG)(fad.nFileSizeHigh) << 32) + fad.nFileSizeLow;
+}
+
 /* ??1_Winit@std@@QAE@XZ */
 /* ??1_Winit@std@@QAE@XZ */
 DEFINE_THISCALL_WRAPPER(_Winit_dtor, 4)