diff --git a/dialects/mysql.go b/dialects/mysql.go
index 6b92752b..79298c56 100644
--- a/dialects/mysql.go
+++ b/dialects/mysql.go
@@ -510,10 +510,16 @@ func (db *mysql) GetColumns(queryer core.Queryer, ctx context.Context, tableName
 		}
 		col.Length = len1
 		col.Length2 = len2
-		if _, ok := schemas.SqlTypes[colType]; ok {
-			col.SQLType = schemas.SQLType{Name: colType, DefaultLength: len1, DefaultLength2: len2}
-		} else {
+		if _, ok := schemas.SqlTypes[colType]; !ok {
+			if !strings.HasPrefix(colType, "UNSIGNED ") {
+				return nil, nil, fmt.Errorf("unknown colType %v", colType)
+			}
+			colType = colType[len("UNSIGNED "):]
+		}
+		if _, ok := schemas.SqlTypes[colType]; !ok {
 			return nil, nil, fmt.Errorf("unknown colType %v", colType)
+		} else {
+			col.SQLType = schemas.SQLType{Name: colType, DefaultLength: len1, DefaultLength2: len2}
 		}
 
 		if colKey == "PRI" {
diff --git a/tests/session_pk_test.go b/tests/session_pk_test.go
index 43de4eea..baf84547 100644
--- a/tests/session_pk_test.go
+++ b/tests/session_pk_test.go
@@ -325,6 +325,48 @@ func TestUint64Id(t *testing.T) {
 	assert.EqualValues(t, 1, cnt)
 }
 
+func TestUnsignedfloat(t *testing.T) {
+	assert.NoError(t, PrepareEngine())
+
+	type UnsignedFloat struct {
+		Id            int64
+		UnsignedFloat float64 `xorm:"UNSIGNED FLOAT"`
+	}
+
+	err := testEngine.DropTables(&UnsignedFloat{})
+	assert.NoError(t, err)
+
+	err = testEngine.CreateTables(&UnsignedFloat{})
+	assert.NoError(t, err)
+
+	tables, err := testEngine.DBMetas()
+	assert.NoError(t, err)
+
+	assert.EqualValues(t, 1, len(tables))
+	cols := tables[0].Columns()
+	assert.EqualValues(t, 2, len(cols))
+	if testEngine.Dialect().URI().DBType == schemas.MYSQL {
+		assert.EqualValues(t, "UNSIGNED FLOAT", cols[1].SQLType.Name)
+	}
+
+	idbean := &UnsignedFloat{UnsignedFloat: 12345678.90123456}
+	cnt, err := testEngine.Insert(idbean)
+	assert.NoError(t, err)
+	assert.EqualValues(t, 1, cnt)
+
+	bean := new(UnsignedFloat)
+	has, err := testEngine.Get(bean)
+	assert.NoError(t, err)
+	assert.True(t, has)
+	assert.EqualValues(t, bean.Id, idbean.Id)
+
+	beans := make([]UnsignedFloat, 0)
+	err = testEngine.Find(&beans)
+	assert.NoError(t, err)
+	assert.EqualValues(t, 1, len(beans))
+	assert.EqualValues(t, *bean, beans[0])
+}
+
 func TestStringPK(t *testing.T) {
 	assert.NoError(t, PrepareEngine())