diff --git a/rdf/content/src/Makefile.in b/rdf/content/src/Makefile.in
index 8d08ec2b2052..1a781d973be4 100644
--- a/rdf/content/src/Makefile.in
+++ b/rdf/content/src/Makefile.in
@@ -31,7 +31,8 @@ CPPSRCS =				\
 	nsJSNodeObserver.cpp		\
 	nsJSXULDocument.cpp		\
 	nsJSXULElement.cpp		\
-	nsJSXULFocusTracker.cpp \
+	nsJSXULFocusTracker.cpp		\
+	nsJSXULTreeElement.cpp		\
 	nsRDFContentUtils.cpp           \
 	nsRDFDOMNodeList.cpp		\
 	nsRDFElement.cpp		\
diff --git a/rdf/content/src/makefile.win b/rdf/content/src/makefile.win
index a0913daaf3b0..a98acfa503c4 100644
--- a/rdf/content/src/makefile.win
+++ b/rdf/content/src/makefile.win
@@ -36,6 +36,7 @@ CPP_OBJS=\
         .\$(OBJDIR)\nsJSNodeObserver.obj          \
         .\$(OBJDIR)\nsJSXULDocument.obj           \
         .\$(OBJDIR)\nsJSXULElement.obj            \
+        .\$(OBJDIR)\nsJSXULTreeElement.obj        \
         .\$(OBJDIR)\nsRDFContentUtils.obj         \
         .\$(OBJDIR)\nsRDFDOMNodeList.obj          \
         .\$(OBJDIR)\nsRDFElement.obj              \
@@ -44,6 +45,7 @@ CPP_OBJS=\
         .\$(OBJDIR)\nsXULDocumentInfo.obj	  \
         .\$(OBJDIR)\nsXULKeyListener.obj          \
         .\$(OBJDIR)\nsXULSortService.obj          \
+        .\$(OBJDIR)\nsXULTreeElement.obj          \
 	$(NULL)
 
 # XXX we are including layout\html\base\src to get HTML elements