diff --git a/pkg/service/class_abstract.go b/pkg/service/class_abstract.go
index 04c6a92..c33e5ea 100644
--- a/pkg/service/class_abstract.go
+++ b/pkg/service/class_abstract.go
@@ -5,6 +5,10 @@ import (
 	"strings"
 )
 
+var (
+	abstractClassDeclarations []Class
+)
+
 type abstractClass struct {
 	name      string
 	Interface *ast.InterfaceType
@@ -82,6 +86,12 @@ func addAbstractClassFromStructType(name string, it *ast.InterfaceType) Class {
 }
 func createAbstractClass(className string) *abstractClass {
 	c := NewAbstractClass(className)
-	addClassDeclaration(c)
+	addAbstractClassDeclaration(c)
 	return c
 }
+func addAbstractClassDeclaration(c Class) {
+	dlock.Lock()
+	defer dlock.Unlock()
+
+	abstractClassDeclarations = append(abstractClassDeclarations, c)
+}
diff --git a/pkg/service/features/app.feature b/pkg/service/features/app.feature
index 75c6679..e947668 100644
--- a/pkg/service/features/app.feature
+++ b/pkg/service/features/app.feature
@@ -352,6 +352,10 @@ dev1=NewDevice();
 ```
 package test
 
+type Device interface {
+    Name() string
+}
+
 type Mera int
 
 const c1 = 4
@@ -360,4 +364,8 @@ const c1 = 4
 ```
 const int c1 = 4;
 typedef int Mera;
+class Device {
+public:
+  virtual std::string Name() = 0;
+};
 ```
diff --git a/pkg/service/service.go b/pkg/service/service.go
index c24ddb6..ccbd72b 100644
--- a/pkg/service/service.go
+++ b/pkg/service/service.go
@@ -87,6 +87,8 @@ func (s *defaultService) Start() error {
 	}
 
 	constDeclarations = nil
+	typeDeclarations = nil
+	abstractClassDeclarations = nil
 	classDeclarations = nil
 	funcDeclarations = nil
 	helpersForDeclarations = nil
@@ -106,6 +108,8 @@ func (s *defaultService) Start() error {
 
 	s.printIncludeHeaders()
 	s.printConstDeclarations()
+	s.printTypeDeclarations()
+	s.printAbstractClassDeclarations()
 	s.printClassDeclarations()
 	s.printFunctionDeclarations()
 	s.printGoHelperDeclarations()
@@ -145,6 +149,32 @@ func (s *defaultService) printConstDeclarations() {
 	}
 	s.out.Write([]byte("\n"))
 }
+func (s *defaultService) printTypeDeclarations() {
+	dlock.Lock()
+	defer dlock.Unlock()
+
+	for _, c := range typeDeclarations {
+		d := c.String()
+		s.out.Write([]byte(d + "\n"))
+		if s.header != nil {
+			s.header.Write([]byte(d + "\n"))
+		}
+	}
+	s.out.Write([]byte("\n"))
+}
+func (s *defaultService) printAbstractClassDeclarations() {
+	dlock.Lock()
+	defer dlock.Unlock()
+
+	for _, c := range abstractClassDeclarations {
+		d := c.String()
+		s.out.Write([]byte(d + "\n"))
+		if s.header != nil {
+			s.header.Write([]byte(d + "\n"))
+		}
+	}
+	s.out.Write([]byte("\n"))
+}
 func (s *defaultService) printClassDeclarations() {
 	dlock.Lock()
 	defer dlock.Unlock()
diff --git a/pkg/service/type.go b/pkg/service/type.go
index 7b5d697..b856761 100644
--- a/pkg/service/type.go
+++ b/pkg/service/type.go
@@ -19,17 +19,6 @@ func handleTypeSpec(s *ast.TypeSpec) (code string) {
 	return handleType(s)
 }
 
-func handleType(s *ast.TypeSpec) (code string) {
-	code += "typedef "
-	code += handleExpr(s.Type)
-	code += " "
-	code += handleIdentExpr(s.Name)
-	code += optionallyAddArrayDetails(s)
-	code += ";"
-
-	return
-}
-
 func optionallyAddArrayDetails(s *ast.TypeSpec) (code string) {
 	v, ok := s.Type.(*ast.ArrayType)
 	if !ok {
diff --git a/pkg/service/types.go b/pkg/service/types.go
new file mode 100644
index 0000000..4397d62
--- /dev/null
+++ b/pkg/service/types.go
@@ -0,0 +1,34 @@
+package service
+
+import "go/ast"
+
+var (
+	typeDeclarations []*Type
+)
+
+type Type struct {
+	s *ast.TypeSpec
+}
+
+func NewType(s *ast.TypeSpec) *Type {
+	return &Type{s: s}
+}
+
+func (c *Type) String() (code string) {
+	code += "typedef "
+	code += handleExpr(c.s.Type)
+	code += " "
+	code += handleIdentExpr(c.s.Name)
+	code += optionallyAddArrayDetails(c.s)
+	code += ";"
+	return
+}
+
+func handleType(s *ast.TypeSpec) (code string) {
+	addType(s)
+	return
+}
+func addType(s *ast.TypeSpec) {
+	c := NewType(s)
+	typeDeclarations = append(typeDeclarations, c)
+}