diff --git a/mozilla/docshell/base/nsWebShell.cpp b/mozilla/docshell/base/nsWebShell.cpp
index 3cc4f2cd2dc..2031e796e19 100644
--- a/mozilla/docshell/base/nsWebShell.cpp
+++ b/mozilla/docshell/base/nsWebShell.cpp
@@ -224,6 +224,7 @@ nsWebShell::ReleaseChildren()
 NS_IMPL_ADDREF(nsWebShell)
 NS_IMPL_RELEASE(nsWebShell)
 
+//XXX missing nsIWebShellContainer!!!
 nsresult
 nsWebShell::QueryInterface(REFNSIID aIID, void** aInstancePtr)
 {
diff --git a/mozilla/webshell/src/nsWebShell.cpp b/mozilla/webshell/src/nsWebShell.cpp
index 3cc4f2cd2dc..2031e796e19 100644
--- a/mozilla/webshell/src/nsWebShell.cpp
+++ b/mozilla/webshell/src/nsWebShell.cpp
@@ -224,6 +224,7 @@ nsWebShell::ReleaseChildren()
 NS_IMPL_ADDREF(nsWebShell)
 NS_IMPL_RELEASE(nsWebShell)
 
+//XXX missing nsIWebShellContainer!!!
 nsresult
 nsWebShell::QueryInterface(REFNSIID aIID, void** aInstancePtr)
 {