diff --git a/kitcom/internal/ts/tsparser.go b/kitcom/internal/ts/tsparser.go
index b02ae12..5c94724 100644
--- a/kitcom/internal/ts/tsparser.go
+++ b/kitcom/internal/ts/tsparser.go
@@ -124,10 +124,10 @@ func (p *TypescriptApiParser) fieldToVal(typ *ast.TypeNode) (types.ValType, erro
 		case "Buffer":
 			return types.TBlob, nil
 		default:
-			return 0, fmt.Errorf("reference type %s is not supported yet", ident.Text)
+			return types.TNoType, fmt.Errorf("reference type %s is not supported yet", ident.Text)
 		}
 	default:
-		return 0, fmt.Errorf("type %s is not supported yet", typ.Kind)
+		return types.TNoType, fmt.Errorf("type %s is not supported yet", typ.Kind)
 	}
 }
 
diff --git a/lib/golang/types/types.go b/lib/golang/types/types.go
index 158f34c..d456c47 100644
--- a/lib/golang/types/types.go
+++ b/lib/golang/types/types.go
@@ -1,28 +1,12 @@
 package types
 
-type ValType int
+type ValType string
 
 const (
-	TInt    ValType = 1
-	TString ValType = 2
-	TBool   ValType = 3
-	TBlob   ValType = 4
-	TArray  ValType = 5
+	TNoType ValType = "" // zero value constant for ValType (please don't use just "" as zero value!)
+	TInt    ValType = "int"
+	TString ValType = "string"
+	TBool   ValType = "bool"
+	TBlob   ValType = "blob"
+	TArray  ValType = "array"
 )
-
-func (v ValType) String() string {
-	switch v {
-	case TInt:
-		return "int"
-	case TString:
-		return "string"
-	case TBool:
-		return "bool"
-	case TBlob:
-		return "blob"
-	case TArray:
-		return "array"
-	default:
-		panic("unreachable code")
-	}
-}