diff --git a/types.go b/types.go
index c2dad7d..e13e006 100644
--- a/types.go
+++ b/types.go
@@ -7,7 +7,7 @@ type Annotation interface {
 }
 
 // AnnotationType is type of Annotation
-var AnnotationType = reflect.TypeOf((*Annotation)(nil))
+var AnnotationType = reflect.TypeOf((*Annotation)(nil)).Elem()
 
 // TypeAnnotation is interface
 type TypeAnnotation interface {
@@ -15,7 +15,7 @@ type TypeAnnotation interface {
 }
 
 // TypeAnnotationType is type of TypeAnnotation
-var TypeAnnotationType = reflect.TypeOf((*TypeAnnotation)(nil))
+var TypeAnnotationType = reflect.TypeOf((*TypeAnnotation)(nil)).Elem()
 
 // MethodAnnotation is interface
 type MethodAnnotation interface {
@@ -23,4 +23,4 @@ type MethodAnnotation interface {
 }
 
 // MethodAnnotationType is type of MethodAnnotation
-var MethodAnnotationType = reflect.TypeOf((*MethodAnnotation)(nil))
+var MethodAnnotationType = reflect.TypeOf((*MethodAnnotation)(nil)).Elem()