diff --git a/src/main/java/lanchon/multidexlib2/RawDexIO.java b/src/main/java/lanchon/multidexlib2/RawDexIO.java
index 3c5f7f6..626af9e 100644
--- a/src/main/java/lanchon/multidexlib2/RawDexIO.java
+++ b/src/main/java/lanchon/multidexlib2/RawDexIO.java
@@ -62,7 +62,7 @@ public class RawDexIO {
 			int dexVersion = HeaderItem.getVersion(buf, offset);
 			opcodes = OpcodeUtils.getOpcodesFromDexVersion(dexVersion);
 		};
-		return new DexBackedDexFile(opcodes, buf, 0);
+		return new DexBackedDexFile(opcodes, buf, offset);
 	}
 
 	// Write