1 files changed, 4 insertions, 0 deletions
diff --git a/newlib/libc/stdio/getc.c b/newlib/libc/stdio/getc.c
index 5b1fa888a..544ac734c 100644
--- a/newlib/libc/stdio/getc.c
+++ b/newlib/libc/stdio/getc.c
@@ -92,9 +92,11 @@ _DEFUN(_getc_r, (ptr, fp),
 {
   int result;
   CHECK_INIT (ptr, fp);
+  __sfp_lock_acquire ();
   _flockfile (fp);
   result = __sgetc_r (ptr, fp);
   _funlockfile (fp);
+  __sfp_lock_release ();
   return result;
 }
 
@@ -106,9 +108,11 @@ _DEFUN(getc, (fp),
 {
   int result;
   CHECK_INIT (_REENT, fp);
+  __sfp_lock_acquire ();
   _flockfile (fp);
   result = __sgetc_r (_REENT, fp);
   _funlockfile (fp);
+  __sfp_lock_release ();
   return result;
 }