diff --git a/be/src/vec/aggregate_functions/aggregate_function_group_array_intersect.h b/be/src/vec/aggregate_functions/aggregate_function_group_array_intersect.h
index 03c1639c45aa09..5d627782f25e4d 100644
--- a/be/src/vec/aggregate_functions/aggregate_function_group_array_intersect.h
+++ b/be/src/vec/aggregate_functions/aggregate_function_group_array_intersect.h
@@ -256,11 +256,11 @@ class AggregateFunctionGroupArrayIntersect
         read_pod_binary(is_set_contains_null, buf);
         data.value->change_contains_null_value(is_set_contains_null);
         read_pod_binary(data.init, buf);
-        size_t size;
+        UInt64 size;
         read_var_uint(size, buf);
 
         T element;
-        for (size_t i = 0; i < size; ++i) {
+        for (UInt64 i = 0; i < size; ++i) {
             read_int_binary(element, buf);
             data.value->insert(static_cast<void*>(&element));
         }
@@ -484,11 +484,11 @@ class AggregateFunctionGroupArrayIntersectGeneric
         read_pod_binary(is_set_contains_null, buf);
         data.value->change_contains_null_value(is_set_contains_null);
         read_pod_binary(data.init, buf);
-        size_t size;
+        UInt64 size;
         read_var_uint(size, buf);
 
         StringRef element;
-        for (size_t i = 0; i < size; ++i) {
+        for (UInt64 i = 0; i < size; ++i) {
             element = read_string_binary_into(*arena, buf);
             data.value->insert((void*)element.data, element.size);
         }