diff --git a/radicale/storage.py b/radicale/storage.py
index d82c736..3edae58 100644
--- a/radicale/storage.py
+++ b/radicale/storage.py
@@ -718,7 +718,6 @@ class Collection(BaseCollection):
                         break
             return collection.serialize()
         elif self.get_meta("tag") == "VADDRESSBOOK":
-            self.logger.debug("Try to serialize VADDRESSBOOK")
             items_ok = []
             result = ""
             for item in items:
@@ -728,7 +727,6 @@ class Collection(BaseCollection):
                 except:
                     self.logger.exception("VCARD broken (skip): %s", item)
             result = "".join([item.serialize() for item in items_ok])
-            self.logger.debug("Try to return VADDRESSBOOK")
             return result
         return ""