diff --git a/expression/builtin_time_test.go b/expression/builtin_time_test.go
index 2c5d409b5a20c..436d0a87289b2 100644
--- a/expression/builtin_time_test.go
+++ b/expression/builtin_time_test.go
@@ -1256,6 +1256,8 @@ func (s *testEvaluatorSuite) TestStrToDate(c *C) {
 		{"15-01-2001 1:59:58.", "%d-%m-%Y %H:%i:%s.%f", true, time.Date(2001, 1, 15, 1, 59, 58, 000000000, time.Local)},
 		{"15-01-2001 1:9:8.999", "%d-%m-%Y %H:%i:%s.%f", true, time.Date(2001, 1, 15, 1, 9, 8, 999000000, time.Local)},
 		{"15-01-2001 1:9:8.999", "%d-%m-%Y %H:%i:%S.%f", true, time.Date(2001, 1, 15, 1, 9, 8, 999000000, time.Local)},
+		{"2003-01-02 10:11:12 PM", "%Y-%m-%d %H:%i:%S %p", false, time.Time{}},
+		{"10:20:10AM", "%H:%i:%S%p", false, time.Time{}},
 	}
 
 	fc := funcs[ast.StrToDate]
diff --git a/types/time.go b/types/time.go
index 8b1efd4231cd3..f9e49a238d929 100644
--- a/types/time.go
+++ b/types/time.go
@@ -1920,6 +1920,9 @@ func mysqlTimeFix(t *MysqlTime, ctx map[string]int) error {
 		_ = yearOfDay
 	}
 	if valueAMorPm, ok := ctx["%p"]; ok {
+		if _, ok := ctx["%H"]; ok {
+			return ErrInvalidTimeFormat.GenWithStackByArgs(t)
+		}
 		if t.hour == 0 {
 			return ErrInvalidTimeFormat.GenWithStackByArgs(t)
 		}
@@ -2300,6 +2303,7 @@ func hour24Numeric(t *MysqlTime, input string, ctx map[string]int) (string, bool
 		return input, false
 	}
 	t.hour = v
+	ctx["%H"] = v
 	return input[length:], true
 }