diff --git a/dexlib/src/main/java/org/jf/dexlib/Item.java b/dexlib/src/main/java/org/jf/dexlib/Item.java
index e029a3e7..825ec28f 100644
--- a/dexlib/src/main/java/org/jf/dexlib/Item.java
+++ b/dexlib/src/main/java/org/jf/dexlib/Item.java
@@ -79,6 +79,7 @@ public abstract class Item<T extends Item> implements Comparable<T> {
      */
     protected int placeAt(int offset, int index) {
         assert offset % getItemType().ItemAlignment == 0:"The offset is not aligned";
+        assert !dexFile.getInplace() || (offset == this.offset && this.index == index);
 
         this.offset = offset;
         this.index = index;
diff --git a/dexlib/src/main/java/org/jf/dexlib/Section.java b/dexlib/src/main/java/org/jf/dexlib/Section.java
index d84c6945..eae06549 100644
--- a/dexlib/src/main/java/org/jf/dexlib/Section.java
+++ b/dexlib/src/main/java/org/jf/dexlib/Section.java
@@ -85,6 +85,7 @@ public abstract class Section<T extends Item> {
     protected int placeAt(int offset) {
         if (items.size() > 0) {
             offset = AlignmentUtils.alignOffset(offset, ItemType.ItemAlignment);
+            assert !DexFile.getInplace() || offset == this.offset;
             this.offset = offset;
 
             for (int i=0; i < items.size(); i++) {