diff --git a/RangeHTTPServer/__init__.py b/RangeHTTPServer/__init__.py
index 666e33a..35a3075 100755
--- a/RangeHTTPServer/__init__.py
+++ b/RangeHTTPServer/__init__.py
@@ -86,6 +86,7 @@ def send_head(self):
         file_len = fs[6]
         if first >= file_len:
             self.send_error(416, 'Requested Range Not Satisfiable')
+            f.close()
             return None
 
         self.send_response(206)