diff --git a/layout/generic/nsFrameSetFrame.cpp b/layout/generic/nsFrameSetFrame.cpp
index cd9a81cc38f..01ce6f7fb24 100644
--- a/layout/generic/nsFrameSetFrame.cpp
+++ b/layout/generic/nsFrameSetFrame.cpp
@@ -1378,7 +1378,6 @@ nsHTMLFramesetFrame::RecalculateBorderResize()
   // number of any type of children
   PRUint32 numChildren = mContent->GetChildCount();
   for (childIndex = 0; childIndex < numChildren; childIndex++) {
-    childTypes[childIndex] = BLANK;
     nsIContent *child = mContent->GetChildAt(childIndex);
 
     if (child->IsNodeOfType(nsINode::eHTML)) {
@@ -1395,9 +1394,6 @@ nsHTMLFramesetFrame::RecalculateBorderResize()
       }
     }
   }
-  for (; childIndex < numCells; ++childIndex) {
-    childTypes[childIndex] = BLANK;
-  }
 
   // set the visibility and mouse sensitivity of borders
   PRInt32 verX;