diff --git a/dlls/msvcr100/msvcr100.spec b/dlls/msvcr100/msvcr100.spec
index 5175884038c..406e9e74089 100644
--- a/dlls/msvcr100/msvcr100.spec
+++ b/dlls/msvcr100/msvcr100.spec
@@ -863,7 +863,7 @@
 @ stub _fwprintf_p
 @ stub _fwprintf_p_l
 @ stub _fwprintf_s_l
-@ stub _fwrite_nolock
+@ cdecl _fwrite_nolock(ptr long long ptr) MSVCRT__fwrite_nolock
 @ varargs _fwscanf_l(ptr wstr ptr) MSVCRT__fwscanf_l
 @ varargs _fwscanf_s_l(ptr wstr ptr) MSVCRT__fwscanf_s_l
 @ cdecl _gcvt(double long str) MSVCRT__gcvt
diff --git a/dlls/msvcr110/msvcr110.spec b/dlls/msvcr110/msvcr110.spec
index 8ba85febe39..0c62d69fd5b 100644
--- a/dlls/msvcr110/msvcr110.spec
+++ b/dlls/msvcr110/msvcr110.spec
@@ -1211,7 +1211,7 @@
 @ stub _fwprintf_p
 @ stub _fwprintf_p_l
 @ stub _fwprintf_s_l
-@ stub _fwrite_nolock
+@ cdecl _fwrite_nolock(ptr long long ptr) MSVCRT__fwrite_nolock
 @ varargs _fwscanf_l(ptr wstr ptr) MSVCRT__fwscanf_l
 @ varargs _fwscanf_s_l(ptr wstr ptr) MSVCRT__fwscanf_s_l
 @ cdecl _gcvt(double long str) MSVCRT__gcvt
diff --git a/dlls/msvcr80/msvcr80.spec b/dlls/msvcr80/msvcr80.spec
index 2d1cb95ab1f..7123a06c9e8 100644
--- a/dlls/msvcr80/msvcr80.spec
+++ b/dlls/msvcr80/msvcr80.spec
@@ -530,7 +530,7 @@
 @ stub _fwprintf_p
 @ stub _fwprintf_p_l
 @ stub _fwprintf_s_l
-@ stub _fwrite_nolock
+@ cdecl _fwrite_nolock(ptr long long ptr) MSVCRT__fwrite_nolock
 @ varargs _fwscanf_l(ptr wstr ptr) MSVCRT__fwscanf_l
 @ varargs _fwscanf_s_l(ptr wstr ptr) MSVCRT__fwscanf_s_l
 @ cdecl _gcvt(double long str) MSVCRT__gcvt
diff --git a/dlls/msvcr90/msvcr90.spec b/dlls/msvcr90/msvcr90.spec
index f43f8115785..41ce18324c3 100644
--- a/dlls/msvcr90/msvcr90.spec
+++ b/dlls/msvcr90/msvcr90.spec
@@ -512,7 +512,7 @@
 @ stub _fwprintf_p
 @ stub _fwprintf_p_l
 @ stub _fwprintf_s_l
-@ stub _fwrite_nolock
+@ cdecl _fwrite_nolock(ptr long long ptr) MSVCRT__fwrite_nolock
 @ varargs _fwscanf_l(ptr wstr ptr) MSVCRT__fwscanf_l
 @ varargs _fwscanf_s_l(ptr wstr ptr) MSVCRT__fwscanf_s_l
 @ cdecl _gcvt(double long str) MSVCRT__gcvt
diff --git a/dlls/msvcrt/file.c b/dlls/msvcrt/file.c
index 51bd7bc7e7c..9a0effd4bbb 100644
--- a/dlls/msvcrt/file.c
+++ b/dlls/msvcrt/file.c
@@ -3706,14 +3706,26 @@ int CDECL MSVCRT__flsbuf(int c, MSVCRT_FILE* file)
  *		fwrite (MSVCRT.@)
  */
 MSVCRT_size_t CDECL MSVCRT_fwrite(const void *ptr, MSVCRT_size_t size, MSVCRT_size_t nmemb, MSVCRT_FILE* file)
+{
+    int ret;
+
+    MSVCRT__lock_file(file);
+    ret = MSVCRT__fwrite_nolock(ptr, size, nmemb, file);
+    MSVCRT__unlock_file(file);
+
+    return ret;
+}
+
+/*********************************************************************
+ *		_fwrite_nolock (MSVCRT.@)
+ */
+MSVCRT_size_t CDECL MSVCRT__fwrite_nolock(const void *ptr, MSVCRT_size_t size, MSVCRT_size_t nmemb, MSVCRT_FILE* file)
 {
     MSVCRT_size_t wrcnt=size * nmemb;
     int written = 0;
     if (size == 0)
         return 0;
 
-    MSVCRT__lock_file(file);
-
     while(wrcnt) {
         if(file->_cnt < 0) {
             WARN("negative file->_cnt value in %p\n", file);
@@ -3761,7 +3773,6 @@ MSVCRT_size_t CDECL MSVCRT_fwrite(const void *ptr, MSVCRT_size_t size, MSVCRT_si
         }
     }
 
-    MSVCRT__unlock_file(file);
     return written / size;
 }
 
diff --git a/dlls/msvcrt/msvcrt.h b/dlls/msvcrt/msvcrt.h
index 9065ebe2079..b5cf8b7bd3f 100644
--- a/dlls/msvcrt/msvcrt.h
+++ b/dlls/msvcrt/msvcrt.h
@@ -926,6 +926,7 @@ MSVCRT_ulong* __cdecl MSVCRT___doserrno(void);
 int* __cdecl     MSVCRT__errno(void);
 char* __cdecl    MSVCRT_getenv(const char*);
 MSVCRT_size_t __cdecl MSVCRT__fread_nolock(void*,MSVCRT_size_t,MSVCRT_size_t,MSVCRT_FILE*);
+MSVCRT_size_t __cdecl MSVCRT__fwrite_nolock(const void*,MSVCRT_size_t,MSVCRT_size_t,MSVCRT_FILE*);
 int __cdecl      MSVCRT_fclose(MSVCRT_FILE*);
 int __cdecl      MSVCRT__fclose_nolock(MSVCRT_FILE*);
 void __cdecl     MSVCRT_terminate(void);
diff --git a/include/msvcrt/stdio.h b/include/msvcrt/stdio.h
index f84a17f2f62..0170d2eef31 100644
--- a/include/msvcrt/stdio.h
+++ b/include/msvcrt/stdio.h
@@ -128,6 +128,7 @@ int    __cdecl _vsnprintf_s(char*,size_t,size_t,const char*,__ms_va_list);
 int    __cdecl _vsprintf_p_l(char*,size_t,const char*,_locale_t,__ms_va_list);
 
 size_t __cdecl _fread_nolock(void*,size_t,size_t,FILE*);
+size_t __cdecl _fwrite_nolock(const void*,size_t,size_t,FILE*);
 int    __cdecl _fclose_nolock(FILE*);
 
 void   __cdecl clearerr(FILE*);