diff --git a/dlls/msvcp140/msvcp140.spec b/dlls/msvcp140/msvcp140.spec
index 15b558df9d1..14e0fa17e05 100644
--- a/dlls/msvcp140/msvcp140.spec
+++ b/dlls/msvcp140/msvcp140.spec
@@ -3762,7 +3762,7 @@
 @ stub __crtCreateSymbolicLinkW
 @ cdecl __crtCreateThreadpoolTimer(ptr ptr ptr) MSVCP__crtCreateThreadpoolTimer
 @ cdecl __crtCreateThreadpoolWait(ptr ptr ptr) MSVCP__crtCreateThreadpoolWait
-@ stub __crtFlushProcessWriteBuffers
+@ cdecl __crtFlushProcessWriteBuffers() MSVCP__crtFlushProcessWriteBuffers
 @ cdecl __crtFreeLibraryWhenCallbackReturns(ptr ptr) MSVCP__crtFreeLibraryWhenCallbackReturns
 @ cdecl __crtGetCurrentProcessorNumber() MSVCP__crtGetCurrentProcessorNumber
 @ stub __crtGetFileInformationByHandleEx
diff --git a/dlls/msvcp90/misc.c b/dlls/msvcp90/misc.c
index 7d9c40899da..9f3724ad22d 100644
--- a/dlls/msvcp90/misc.c
+++ b/dlls/msvcp90/misc.c
@@ -1262,6 +1262,14 @@ DWORD CDECL MSVCP__crtGetCurrentProcessorNumber(void)
     return GetCurrentProcessorNumber();
 }
 
+/*********************************************************************
+ *  __crtFlushProcessWriteBuffers (MSVCP140.@)
+ */
+VOID CDECL MSVCP__crtFlushProcessWriteBuffers(void)
+{
+    return FlushProcessWriteBuffers();
+}
+
 /*********************************************************************
  *  __crtCreateSemaphoreExW (MSVCP140.@)
  */
diff --git a/include/winbase.h b/include/winbase.h
index b7f86a2cb61..67c29b51c55 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1985,6 +1985,7 @@ WINBASEAPI PVOID       WINAPI FlsGetValue(DWORD);
 WINBASEAPI BOOL        WINAPI FlsSetValue(DWORD,PVOID);
 WINBASEAPI BOOL        WINAPI FlushFileBuffers(HANDLE);
 WINBASEAPI BOOL        WINAPI FlushInstructionCache(HANDLE,LPCVOID,SIZE_T);
+WINBASEAPI VOID        WINAPI FlushProcessWriteBuffers(void);
 WINBASEAPI BOOL        WINAPI FlushViewOfFile(LPCVOID,SIZE_T);
 WINBASEAPI DWORD       WINAPI FormatMessageA(DWORD,LPCVOID,DWORD,DWORD,LPSTR,DWORD,__ms_va_list*);
 WINBASEAPI DWORD       WINAPI FormatMessageW(DWORD,LPCVOID,DWORD,DWORD,LPWSTR,DWORD,__ms_va_list*);