diff --git a/lib/Makefile.vc6 b/lib/Makefile.vc6
index 0aaac582dc..09fd14a9c2 100644
--- a/lib/Makefile.vc6
+++ b/lib/Makefile.vc6
@@ -483,6 +483,7 @@ X_OBJS= \
 	$(DIROBJ)\mprintf.obj \
 	$(DIROBJ)\multi.obj \
 	$(DIROBJ)\netrc.obj \
+        $(DIROBJ)\nonblock.obj \
 	$(DIROBJ)\parsedate.obj \
 	$(DIROBJ)\progress.obj \
 	$(DIROBJ)\rawstr.obj \