1 files changed, 6 insertions, 1 deletions
diff --git a/newlib/libc/stdio/fgetpos.c b/newlib/libc/stdio/fgetpos.c
index 214021a84..ed6f5cfd3 100644
--- a/newlib/libc/stdio/fgetpos.c
+++ b/newlib/libc/stdio/fgetpos.c
@@ -53,9 +53,14 @@ _DEFUN (fgetpos, (fp, pos),
 	FILE * fp _AND
 	fpos_t * pos)
 {
+  _flockfile(fp);
   *pos = ftell (fp);
 
   if (*pos != -1)
-    return 0;
+    {
+      _funlockfile(fp);
+      return 0;
+    }
+  _funlockfile(fp);
   return 1;
 }