diff --git a/msvc/Makefile.msvc6 b/msvc/Makefile.msvc6
index e59a5504b..d1f6aaf93 100644
--- a/msvc/Makefile.msvc6
+++ b/msvc/Makefile.msvc6
@@ -59,7 +59,7 @@ mkinstalldirs = $(SHELL) $(top_srcdir)/gc/mkinstalldirs
 
 SUBDIR        = c gc gmp
 LIBRARIES     =
-LSP_LIBRARIES = cmp.fas clx.fas sysfun.lsp
+LSP_LIBRARIES = cmp.fas clx.fas sysfun.lsp sockets.fas
 TARGETS       = ecl.exe
 DEF           = ecl.def
 # Define here the processor type to compile GMP library
@@ -187,6 +187,9 @@ eclgmp.lib:
 sysfun.lsp:
 	$(CP) $(srcdir)\cmp\sysfun.lsp .\
 
+rt.lisp:
+	$(CP) $(srcdir)\..\contrib\rt\rt.lisp .\
+
 install: install-base
 	for %h in (gc.h gc_local_alloc.h gc_pthread_redirects.h \
 	           gc_config_macros.h leak_detector.h gc_typed.h) \