diff --git a/expression/builtin_string.go b/expression/builtin_string.go
index 3f94a43231490..2c24f1e6e1783 100644
--- a/expression/builtin_string.go
+++ b/expression/builtin_string.go
@@ -1209,6 +1209,11 @@ func (b *builtinSubstringIndexSig) evalString(row types.Row) (d string, isNull b
 	} else {
 		// If count is negative, everything to the right of the final delimiter (counting from the right) is returned.
 		count = -count
+		if count < 0 {
+			// -count overflows max int64, returns an empty string.
+			return "", false, nil
+		}
+
 		if count < end {
 			start = end - count
 		}
diff --git a/expression/integration_test.go b/expression/integration_test.go
index b84f37c572701..44d0eaaef43a7 100644
--- a/expression/integration_test.go
+++ b/expression/integration_test.go
@@ -736,6 +736,7 @@ func (s *testIntegrationSuite) TestStringBuiltin(c *C) {
 	result.Check(testkit.Rows("www.pingcap 12345 45 2017 01:01"))
 	result = tk.MustQuery(`select substring_index('www.pingcap.com', '.', 0), substring_index('www.pingcap.com', '.', 100), substring_index('www.pingcap.com', '.', -100)`)
 	result.Check(testkit.Rows(" www.pingcap.com www.pingcap.com"))
+	tk.MustQuery(`select substring_index('xyz', 'abc', 9223372036854775808)`).Check(testkit.Rows(``))
 	result = tk.MustQuery(`select substring_index('www.pingcap.com', 'd', 1), substring_index('www.pingcap.com', '', 1), substring_index('', '.', 1)`)
 	result.Check(testutil.RowsWithSep(",", "www.pingcap.com,,"))
 	result = tk.MustQuery(`select substring_index(null, '.', 1), substring_index('www.pingcap.com', null, 1), substring_index('www.pingcap.com', '.', null)`)