diff --git a/be/src/vec/functions/random.cpp b/be/src/vec/functions/random.cpp
index 817fa5e94b8343f..fb6d9c60a53c4e7 100644
--- a/be/src/vec/functions/random.cpp
+++ b/be/src/vec/functions/random.cpp
@@ -72,7 +72,7 @@ class Random : public IFunction {
                 if (!context->is_col_constant(0)) {
                     return Status::InvalidArgument("The param of rand function must be literal");
                 }
-                int64_t seed = 0;
+                uint64_t seed = 0;
                 if (!context->get_constant_col(0)->column_ptr->is_null_at(0)) {
                     seed = (*context->get_constant_col(0)->column_ptr)[0].get<int64_t>();
                 }