diff --git a/Makefile.netware b/Makefile.netware
index b521cb83..1e014ed9 100644
--- a/Makefile.netware
+++ b/Makefile.netware
@@ -354,6 +354,7 @@ else
 endif
 	@echo $(DL)#define HAVE_ARPA_INET_H 1$(DL) >> $@
 	@echo $(DL)#define HAVE_ASSERT_H 1$(DL) >> $@
+	@echo $(DL)#define HAVE_ERRNO_H 1$(DL) >> $@
 	@echo $(DL)#define HAVE_ERR_H 1$(DL) >> $@
 	@echo $(DL)#define HAVE_FCNTL_H 1$(DL) >> $@
 	@echo $(DL)#define HAVE_GETHOSTBYADDR 1$(DL) >> $@