diff --git a/src/main/java/com/reandroid/arsc/header/HeaderBlock.java b/src/main/java/com/reandroid/arsc/header/HeaderBlock.java
index 39bdefe..84307ff 100755
--- a/src/main/java/com/reandroid/arsc/header/HeaderBlock.java
+++ b/src/main/java/com/reandroid/arsc/header/HeaderBlock.java
@@ -53,6 +53,9 @@ import java.util.List;
     public HeaderBlock(ChunkType chunkType){
         this(chunkType.ID);
     }
+    public int getMinimumSize(){
+        return countBytes();
+    }
     public ByteArray getExtraBytes() {
          return extraBytes;
     }
diff --git a/src/main/java/com/reandroid/arsc/header/InfoHeader.java b/src/main/java/com/reandroid/arsc/header/InfoHeader.java
index 53fe7f8..621cf0f 100644
--- a/src/main/java/com/reandroid/arsc/header/InfoHeader.java
+++ b/src/main/java/com/reandroid/arsc/header/InfoHeader.java
@@ -30,6 +30,12 @@
      public InfoHeader() {
          this((short) 0);
      }
+
+     @Override
+     public int getMinimumSize(){
+         return INFO_MIN_SIZE;
+     }
+
      @Override
      void initExtraBytes(ByteArray extraBytes, int difference){
      }
@@ -55,4 +61,6 @@
          infoHeader.readBytes(blockReader);
          return infoHeader;
      }
+
+     private static final int INFO_MIN_SIZE = 8;
  }
diff --git a/src/main/java/com/reandroid/arsc/header/TypeHeader.java b/src/main/java/com/reandroid/arsc/header/TypeHeader.java
index 1c73584..2e3911b 100644
--- a/src/main/java/com/reandroid/arsc/header/TypeHeader.java
+++ b/src/main/java/com/reandroid/arsc/header/TypeHeader.java
@@ -44,6 +44,10 @@ public class TypeHeader extends HeaderBlock{
         addChild(config);
     }
 
+    @Override
+    public int getMinimumSize(){
+        return TYPE_MIN_SIZE;
+    }
     public ByteItem getId() {
         return id;
     }
@@ -72,4 +76,7 @@ public class TypeHeader extends HeaderBlock{
                 +", entriesStart=" + getEntriesStart()
                 +", config=" + getConfig() + '}';
     }
+
+    //typeHeader.countBytes() - getConfig().countBytes() + ResConfig.SIZE_16
+    private static final int TYPE_MIN_SIZE = 36;
 }
diff --git a/src/main/java/com/reandroid/arsc/io/BlockReader.java b/src/main/java/com/reandroid/arsc/io/BlockReader.java
index c8d3104..7fd3cf3 100755
--- a/src/main/java/com/reandroid/arsc/io/BlockReader.java
+++ b/src/main/java/com/reandroid/arsc/io/BlockReader.java
@@ -70,7 +70,7 @@ import java.io.*;
      }
     public TypeHeader readTypeHeader() throws IOException{
         TypeHeader typeHeader = new TypeHeader();
-        if(available() < typeHeader.countBytes()){
+        if(available() < typeHeader.getMinimumSize()){
             return null;
         }
         int pos = getPosition();
@@ -80,7 +80,7 @@ import java.io.*;
     }
     public InfoHeader readHeaderBlock() throws IOException {
         InfoHeader infoHeader = new InfoHeader();
-        if(available() < infoHeader.countBytes()){
+        if(available() < infoHeader.getMinimumSize()){
             return null;
         }
         int pos = getPosition();