diff --git a/flecs.c b/flecs.c
index 5ca203a1d9..ffc4a4b5a3 100644
--- a/flecs.c
+++ b/flecs.c
@@ -35109,6 +35109,8 @@ int flecs_json_serialize_children_alerts(
         }
     }
 
+    ecs_filter_fini(&f);
+
     return 0;
 error:
     return -1;
diff --git a/src/addons/json/serialize.c b/src/addons/json/serialize.c
index 31d8057404..36aa2dac67 100644
--- a/src/addons/json/serialize.c
+++ b/src/addons/json/serialize.c
@@ -1050,6 +1050,8 @@ int flecs_json_serialize_children_alerts(
         }
     }
 
+    ecs_filter_fini(&f);
+
     return 0;
 error:
     return -1;