1 files changed, 4 insertions, 4 deletions
diff --git a/newlib/libc/stdio64/fdopen64.c b/newlib/libc/stdio64/fdopen64.c
index aa5a9ce56..d0fd0d584 100644
--- a/newlib/libc/stdio64/fdopen64.c
+++ b/newlib/libc/stdio64/fdopen64.c
@@ -63,9 +63,6 @@ _DEFUN (_fdopen64_r, (ptr, fd, mode),
 
   if ((fp = __sfp (ptr)) == 0)
     return 0;
-
-  _flockfile(fp);
-
   fp->_flags = flags;
   /*
    * If opened for appending, but underlying descriptor
@@ -102,9 +99,12 @@ _DEFUN (_fdopen64_r, (ptr, fd, mode),
     fp->_flags |= __SCLE;
 #endif
 
+#ifndef __SINGLE_THREAD__
+  __lock_init_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
+#endif
+
   fp->_flags |= __SL64;
 
-  _funlockfile(fp);
   return fp;
 }