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>();
                 }
diff --git a/be/test/vec/function/function_math_test.cpp b/be/test/vec/function/function_math_test.cpp
index bb24d141e4c3be5..d04b83433888a65 100644
--- a/be/test/vec/function/function_math_test.cpp
+++ b/be/test/vec/function/function_math_test.cpp
@@ -441,8 +441,8 @@ TEST(MathFunctionTest, random_test) {
                         {{(int64_t)0}, 0.15979336337046085},
                         {{(int64_t)10}, 0.60128310734097479},
                         {{(int64_t)123}, 0.31320017867847078},
-                        {{(int64_t)std::numeric_limits<int64_t>::max()}, 0.20676730979843233},
-                        {{(int64_t)std::numeric_limits<int64_t>::min()}, 0.15979336337046085}};
+                        {{(int64_t)std::numeric_limits<int64_t>::max()}, 0.54774821662127238},
+                        {{(int64_t)std::numeric_limits<int64_t>::min()}, 0.75146173420574858}};
 
     for (const auto& data : data_set) {
         DataSet data_line = {data};