diff --git a/km3io/tools.py b/km3io/tools.py
index c25e91061eaaac36b109795fb3539bc79265a474..e7bd86dc295cf16fbae60185f1dbb4b74b5a002b 100644
--- a/km3io/tools.py
+++ b/km3io/tools.py
@@ -126,7 +126,6 @@ class Branch:
         for k in self._mapper.update.values():
             del self._keymap[k]
 
-        print(self._keymap)
         for key in self._keymap.keys():
             setattr(self, key, None)