diff --git a/reactos/lib/sdk/crt/stdio/file.c b/reactos/lib/sdk/crt/stdio/file.c
index 98e3cd3df3f..1e63acf93bf 100644
--- a/reactos/lib/sdk/crt/stdio/file.c
+++ b/reactos/lib/sdk/crt/stdio/file.c
@@ -117,6 +117,11 @@ static CRITICAL_SECTION FILE_cs;
 #define LOCK_FILES()    do { EnterCriticalSection(&FILE_cs); } while (0)
 #define UNLOCK_FILES()  do { LeaveCriticalSection(&FILE_cs); } while (0)
 
+FILE *__cdecl __iob_func()
+{
+  return _iob;
+}
+
 static inline BOOL is_valid_fd(int fd)
 {
   return fd >= 0 && fd < fdend && (fdesc[fd].wxflag & WX_OPEN);