diff --git a/types/convert.go b/types/convert.go
index a3e5b572e0add..6ae428d7242c0 100644
--- a/types/convert.go
+++ b/types/convert.go
@@ -246,7 +246,7 @@ func convertDecimalStrToUint(sc *stmtctx.StatementContext, str string, upperBoun
 	if intStr == "" {
 		intStr = "0"
 	}
-	if sc.ShouldClipToZero() && intStr[0] == '-' {
+	if intStr[0] == '-' {
 		return 0, overflow(str, tp)
 	}
 
@@ -255,8 +255,7 @@ func convertDecimalStrToUint(sc *stmtctx.StatementContext, str string, upperBoun
 		round++
 	}
 
-	upperBound -= round
-	upperStr := strconv.FormatUint(upperBound, 10)
+	upperStr := strconv.FormatUint(upperBound-round, 10)
 	if len(intStr) > len(upperStr) ||
 		(len(intStr) == len(upperStr) && intStr > upperStr) {
 		return upperBound, overflow(str, tp)
diff --git a/types/convert_test.go b/types/convert_test.go
index b28560dfbdf75..db9cb2ba691fd 100644
--- a/types/convert_test.go
+++ b/types/convert_test.go
@@ -1275,8 +1275,9 @@ func TestConvertDecimalStrToUint(t *testing.T) {
 		{"9223372036854775807.4999", 9223372036854775807, true},
 		{"18446744073709551614.55", 18446744073709551615, true},
 		{"18446744073709551615.344", 18446744073709551615, true},
-		{"18446744073709551615.544", 0, false},
+		{"18446744073709551615.544", 18446744073709551615, false},
 		{"-111.111", 0, false},
+		{"-10000000000000000000.0", 0, false},
 	}
 	for _, ca := range cases {
 		result, err := convertDecimalStrToUint(&stmtctx.StatementContext{}, ca.input, math.MaxUint64, 0)
@@ -1284,7 +1285,15 @@ func TestConvertDecimalStrToUint(t *testing.T) {
 			require.Error(t, err)
 		} else {
 			require.NoError(t, err)
-			require.Equal(t, ca.result, result)
 		}
+		require.Equal(t, ca.result, result, "input=%v", ca.input)
 	}
+
+	result, err := convertDecimalStrToUint(&stmtctx.StatementContext{}, "-99.0", math.MaxUint8, 0)
+	require.Error(t, err)
+	require.Equal(t, uint64(0), result)
+
+	result, err = convertDecimalStrToUint(&stmtctx.StatementContext{}, "-100.0", math.MaxUint8, 0)
+	require.Error(t, err)
+	require.Equal(t, uint64(0), result)
 }