diff --git a/src/org/fox/ttrss/types/Article.java b/src/org/fox/ttrss/types/Article.java
index 2ad86e91..bf9614e8 100644
--- a/src/org/fox/ttrss/types/Article.java
+++ b/src/org/fox/ttrss/types/Article.java
@@ -27,6 +27,10 @@ public class Article implements Parcelable {
 		readFromParcel(in);
 	}
 	
+	public Article() {
+		
+	}
+	
 	public Article(int id) {
 		this.id = id;
 		this.title = "";
diff --git a/src/org/fox/ttrss/types/Attachment.java b/src/org/fox/ttrss/types/Attachment.java
index 7b77d5db..58e5b37f 100644
--- a/src/org/fox/ttrss/types/Attachment.java
+++ b/src/org/fox/ttrss/types/Attachment.java
@@ -19,6 +19,10 @@ public class Attachment implements Parcelable {
 		readFromParcel(in);
 	}
 	
+	public Attachment() {
+		
+	}
+	
 	@Override
 	public int describeContents() {
 		return 0;
diff --git a/src/org/fox/ttrss/types/Feed.java b/src/org/fox/ttrss/types/Feed.java
index 25077686..91d12308 100644
--- a/src/org/fox/ttrss/types/Feed.java
+++ b/src/org/fox/ttrss/types/Feed.java
@@ -24,6 +24,10 @@ public class Feed implements Comparable<Feed>, Parcelable {
 		readFromParcel(in);
 	}
 	
+	public Feed() {
+		
+	}
+	
 	@Override
 	public int compareTo(Feed feed) {
 		if (feed.unread != this.unread)
diff --git a/src/org/fox/ttrss/types/FeedCategory.java b/src/org/fox/ttrss/types/FeedCategory.java
index d4f68bfb..202a2dd6 100644
--- a/src/org/fox/ttrss/types/FeedCategory.java
+++ b/src/org/fox/ttrss/types/FeedCategory.java
@@ -20,6 +20,10 @@ public class FeedCategory implements Parcelable {
 		this.order_id = 0;
 	}
 
+	public FeedCategory() {
+		
+	}
+	
 	@Override
 	public int describeContents() {
 		return 0;
diff --git a/src/org/fox/ttrss/types/Label.java b/src/org/fox/ttrss/types/Label.java
index fd4ce930..ff81ffa6 100644
--- a/src/org/fox/ttrss/types/Label.java
+++ b/src/org/fox/ttrss/types/Label.java
@@ -6,4 +6,8 @@ public class Label {
 	public String fg_color;
 	public String bg_color;
 	public boolean checked;
+	
+	public Label() {
+		
+	}
 }