diff --git a/docshell/shistory/nsSHistory.cpp b/docshell/shistory/nsSHistory.cpp
index d362173c9be1..d36a7582fdb4 100644
--- a/docshell/shistory/nsSHistory.cpp
+++ b/docshell/shistory/nsSHistory.cpp
@@ -588,7 +588,7 @@ nsSHistory::GetEntryAtIndex(int32_t aIndex, bool aModifyIndex,
 }
 
 /* Get the transaction at a given index */
-NS_IMETHODIMP
+nsresult
 nsSHistory::GetTransactionAtIndex(int32_t aIndex, nsISHTransaction** aResult)
 {
   nsresult rv;
@@ -1703,7 +1703,7 @@ nsSHistory::LoadNextPossibleEntry(int32_t aNewIndex, long aLoadType,
   return NS_ERROR_FAILURE;
 }
 
-NS_IMETHODIMP
+nsresult
 nsSHistory::LoadEntry(int32_t aIndex, long aLoadType, uint32_t aHistCmd)
 {
   if (!mRootDocShell) {
diff --git a/docshell/shistory/nsSHistory.h b/docshell/shistory/nsSHistory.h
index 2cee92d7bd15..a8933ad17763 100644
--- a/docshell/shistory/nsSHistory.h
+++ b/docshell/shistory/nsSHistory.h
@@ -83,15 +83,14 @@ private:
   friend class nsSHEnumerator;
   friend class nsSHistoryObserver;
 
-  // Could become part of nsIWebNavigation
-  NS_IMETHOD GetTransactionAtIndex(int32_t aIndex, nsISHTransaction** aResult);
+  nsresult GetTransactionAtIndex(int32_t aIndex, nsISHTransaction** aResult);
   nsresult LoadDifferingEntries(nsISHEntry* aPrevEntry, nsISHEntry* aNextEntry,
                                 nsIDocShell* aRootDocShell, long aLoadType,
                                 bool& aDifferenceFound);
   nsresult InitiateLoad(nsISHEntry* aFrameEntry, nsIDocShell* aFrameDS,
                         long aLoadType);
 
-  NS_IMETHOD LoadEntry(int32_t aIndex, long aLoadType, uint32_t aHistCmd);
+  nsresult LoadEntry(int32_t aIndex, long aLoadType, uint32_t aHistCmd);
 
 #ifdef DEBUG
   nsresult PrintHistory();