diff --git a/pluggy/__init__.py b/pluggy/__init__.py
index 42d2220b..fa012905 100644
--- a/pluggy/__init__.py
+++ b/pluggy/__init__.py
@@ -626,6 +626,8 @@ def call_historic(self, proc=None, kwargs=None):
         self._call_history.append((kwargs or {}, proc))
         # historizing hooks don't return results
         res = self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
+        if proc is None:
+            return
         for x in res or []:
             proc(x)