1 files changed, 2 insertions, 2 deletions
diff --git a/synapse/events/validator.py b/synapse/events/validator.py
index a6f0104396..fb1737b910 100644
--- a/synapse/events/validator.py
+++ b/synapse/events/validator.py
@@ -139,7 +139,7 @@ class EventValidator:
         max_lifetime = event.content.get("max_lifetime")
 
         if min_lifetime is not None:
-            if not isinstance(min_lifetime, int):
+            if type(min_lifetime) is not int:
                 raise SynapseError(
                     code=400,
                     msg="'min_lifetime' must be an integer",
@@ -147,7 +147,7 @@ class EventValidator:
                 )
 
         if max_lifetime is not None:
-            if not isinstance(max_lifetime, int):
+            if type(max_lifetime) is not int:
                 raise SynapseError(
                     code=400,
                     msg="'max_lifetime' must be an integer",