diff --git a/content/html/content/src/nsGenericHTMLElement.cpp b/content/html/content/src/nsGenericHTMLElement.cpp
index e36d3fa3efc0..eb46f5e00e40 100644
--- a/content/html/content/src/nsGenericHTMLElement.cpp
+++ b/content/html/content/src/nsGenericHTMLElement.cpp
@@ -1125,6 +1125,7 @@ SetDocumentInChildrenOf(nsIContent* aContent, nsIDocument* aDocument)
     aContent->ChildAt(i, child);
     if (nsnull != child) {
       child->SetDocument(aDocument, PR_TRUE);
+      NS_RELEASE(child);
     }
   }
 }
diff --git a/layout/html/content/src/nsGenericHTMLElement.cpp b/layout/html/content/src/nsGenericHTMLElement.cpp
index e36d3fa3efc0..eb46f5e00e40 100644
--- a/layout/html/content/src/nsGenericHTMLElement.cpp
+++ b/layout/html/content/src/nsGenericHTMLElement.cpp
@@ -1125,6 +1125,7 @@ SetDocumentInChildrenOf(nsIContent* aContent, nsIDocument* aDocument)
     aContent->ChildAt(i, child);
     if (nsnull != child) {
       child->SetDocument(aDocument, PR_TRUE);
+      NS_RELEASE(child);
     }
   }
 }
diff --git a/layout/html/content/src/nsHTMLGenericContent.cpp b/layout/html/content/src/nsHTMLGenericContent.cpp
index aed6318d8618..96102fa1a91a 100644
--- a/layout/html/content/src/nsHTMLGenericContent.cpp
+++ b/layout/html/content/src/nsHTMLGenericContent.cpp
@@ -2265,6 +2265,7 @@ SetDocumentInChildrenOf(nsIContent* aContent, nsIDocument* aDocument)
     if (nsnull != child) {
       child->SetDocument(aDocument);
       SetDocumentInChildrenOf(child, aDocument);
+      NS_RELEASE(child);
     }
   }
 }