diff --git a/chrome/src/nsChromeRegistry.cpp b/chrome/src/nsChromeRegistry.cpp
index be34a2c4fcd..6dfe7484cc3 100644
--- a/chrome/src/nsChromeRegistry.cpp
+++ b/chrome/src/nsChromeRegistry.cpp
@@ -1651,6 +1651,9 @@ nsChromeRegistry::AddToCompositeDataSource(PRBool aUseProfile)
 NS_IMETHODIMP
 nsChromeRegistry::GetBackstopSheets(nsISupportsArray **aResult)
 {
+  if (!mScrollbarSheet)
+    LoadStyleSheet(getter_AddRefs(mScrollbarSheet), "chrome://global/skin/scrollbars.css"); 
+
   if(mScrollbarSheet || mUserSheet)
   {
     NS_NewISupportsArray(aResult);
diff --git a/rdf/chrome/src/nsChromeRegistry.cpp b/rdf/chrome/src/nsChromeRegistry.cpp
index be34a2c4fcd..6dfe7484cc3 100644
--- a/rdf/chrome/src/nsChromeRegistry.cpp
+++ b/rdf/chrome/src/nsChromeRegistry.cpp
@@ -1651,6 +1651,9 @@ nsChromeRegistry::AddToCompositeDataSource(PRBool aUseProfile)
 NS_IMETHODIMP
 nsChromeRegistry::GetBackstopSheets(nsISupportsArray **aResult)
 {
+  if (!mScrollbarSheet)
+    LoadStyleSheet(getter_AddRefs(mScrollbarSheet), "chrome://global/skin/scrollbars.css"); 
+
   if(mScrollbarSheet || mUserSheet)
   {
     NS_NewISupportsArray(aResult);