diff --git a/dialects/oracle.go b/dialects/oracle.go
index 8328ff15..ce91cd5d 100644
--- a/dialects/oracle.go
+++ b/dialects/oracle.go
@@ -548,7 +548,14 @@ func (db *oracle) Features() *DialectFeatures {
 func (db *oracle) SQLType(c *schemas.Column) string {
 	var res string
 	switch t := c.SQLType.Name; t {
-	case schemas.Bit, schemas.TinyInt, schemas.SmallInt, schemas.MediumInt, schemas.Int, schemas.Integer, schemas.BigInt, schemas.Bool, schemas.Serial, schemas.BigSerial:
+	case schemas.Bool:
+		if c.Default == "true" {
+			c.Default = "1"
+		} else if c.Default == "false" {
+			c.Default = "0"
+		}
+		res = "NUMBER(1,0)"
+	case schemas.Bit, schemas.TinyInt, schemas.SmallInt, schemas.MediumInt, schemas.Int, schemas.Integer, schemas.BigInt, schemas.Serial, schemas.BigSerial:
 		res = "NUMBER"
 	case schemas.Binary, schemas.VarBinary, schemas.Blob, schemas.TinyBlob, schemas.MediumBlob, schemas.LongBlob, schemas.Bytea:
 		return schemas.Blob