diff --git a/gcsfs/core.py b/gcsfs/core.py
index 786f9295..b855ba6e 100644
--- a/gcsfs/core.py
+++ b/gcsfs/core.py
@@ -27,6 +27,10 @@
 from .inventory_report import InventoryReport
 from .retry import errs, retry_request, validate_response
 
+os.register_at_fork(
+    after_in_child=asyn.reset_lock,
+)
+
 logger = logging.getLogger("gcsfs")