diff --git a/swift/element.go b/swift/element.go
index bbb0c94..c2a91f2 100644
--- a/swift/element.go
+++ b/swift/element.go
@@ -111,12 +111,12 @@ type CustomFieldTag struct {
 	TransactionID      int
 	BookingText        string
 	PrimanotenNumber   string
-	Purpose            string
+	Purpose            []string
 	BankID             string
 	AccountID          string
 	Name               string
 	MessageKeyAddition int
-	Purpose2           string
+	Purpose2           []string
 }
 
 var customFieldTagFieldKeys = [][]byte{
@@ -187,7 +187,7 @@ func (c *CustomFieldTag) Unmarshal(value []byte) error {
 		case bytes.HasPrefix(fieldKey, []byte{'?', '1', '0'}):
 			c.PrimanotenNumber = fieldValue
 		case bytes.HasPrefix(fieldKey, []byte{'?', '2'}):
-			c.Purpose += fieldValue
+			c.Purpose = append(c.Purpose, fieldValue)
 		case bytes.HasPrefix(fieldKey, []byte{'?', '3', '0'}):
 			c.BankID = fieldValue
 		case bytes.HasPrefix(fieldKey, []byte{'?', '3', '1'}):
@@ -203,7 +203,7 @@ func (c *CustomFieldTag) Unmarshal(value []byte) error {
 			}
 			c.MessageKeyAddition = messageKeyAddition
 		case bytes.HasPrefix(fieldKey, []byte{'?', '6'}):
-			c.Purpose2 += fieldValue
+			c.Purpose2 = append(c.Purpose2, fieldValue)
 		default:
 			internal.Debug.Printf("Unmarshal CustomFieldTag: unknown fieldKey: %s\n", fieldKey)
 		}
diff --git a/swift/element_test.go b/swift/element_test.go
index 5434c9f..de39463 100644
--- a/swift/element_test.go
+++ b/swift/element_test.go
@@ -13,12 +13,12 @@ func TestCustomFieldTagUnmarshal(t *testing.T) {
 		TransactionID:      123,
 		BookingText:        "ABC",
 		PrimanotenNumber:   "xyz",
-		Purpose:            "ahhhjj",
+		Purpose:            []string{"ahh", "hjj"},
 		BankID:             "1000",
 		AccountID:          "56",
 		Name:               "Max Muster",
 		MessageKeyAddition: 99,
-		Purpose2:           "uuz4",
+		Purpose2:           []string{"uu", "z4"},
 	}
 
 	tag := &CustomFieldTag{}
diff --git a/swift/mt940.go b/swift/mt940.go
index b86a7d8..ba484ce 100644
--- a/swift/mt940.go
+++ b/swift/mt940.go
@@ -65,8 +65,8 @@ func (m *MT940) AccountTransactions() []domain.AccountTransaction {
 			transaction.BankID = descr.BankID
 			transaction.AccountID = descr.AccountID
 			transaction.Name = descr.Name
-			transaction.Purpose = descr.Purpose
-			transaction.Purpose2 = descr.Purpose2
+			transaction.Purpose = strings.Join(descr.Purpose, " ")
+			transaction.Purpose2 = strings.Join(descr.Purpose2, " ")
 			transaction.TransactionID = descr.TransactionID
 		}
 		transactions = append(transactions, transaction)