diff --git a/TOOLS/umpv b/TOOLS/umpv
index d701166f72..300e6334a3 100755
--- a/TOOLS/umpv
+++ b/TOOLS/umpv
@@ -87,7 +87,7 @@ else:
             pass
         else:
             raise e
-    os.mkfifo(FIFO, 0600)
+    os.mkfifo(FIFO, int("0600", 8))
 
     subprocess.check_call(["mpv", "--really-quiet", "--force-window",
                            "--input-file=" + FIFO, "--"] + files)