diff --git a/layout/html/document/src/makefile.win b/layout/html/document/src/makefile.win
index 66d7935605f..d62a54d7e3c 100644
--- a/layout/html/document/src/makefile.win
+++ b/layout/html/document/src/makefile.win
@@ -39,7 +39,7 @@ CPPSRCS=					\
 CPP_OBJS=					\
 	.\$(OBJDIR)\nsHTMLContentSink.obj	\
 	.\$(OBJDIR)\nsHTMLDocument.obj		\
-	.\$(OBJDIR)\nsHTMLFragmentContentSink.cpp	\
+	.\$(OBJDIR)\nsHTMLFragmentContentSink.obj	\
 	.\$(OBJDIR)\nsFrameFrame.obj		\
 	.\$(OBJDIR)\nsFrameSetFrame.obj		\
 	.\$(OBJDIR)\nsImageDocument.obj		\