diff --git a/src/aiokv/aiokv.py b/src/aiokv/aiokv.py
index 2a8ad04..d6edb4e 100644
--- a/src/aiokv/aiokv.py
+++ b/src/aiokv/aiokv.py
@@ -170,7 +170,8 @@ class AioKV:
         """check whether pid refers to a live process, without permission to signal counting as alive"""
         try:
             os.kill(pid, 0)
-        except ProcessLookupError:
+        except (ProcessLookupError, OverflowError):
+            # OverflowError: a pid too large for a C int can't name a live process
             return False
         except PermissionError:
             return True