diff --git a/unix/vncviewer/Makefile.am b/unix/vncviewer/Makefile.am
index cfbe430..32d5c6c 100644
--- a/unix/vncviewer/Makefile.am
+++ b/unix/vncviewer/Makefile.am
@@ -16,6 +16,7 @@
 	$(top_builddir)/common/rfb/librfb.la \
 	$(top_builddir)/common/network/libnetwork.la \
 	$(top_builddir)/common/rdr/librdr.la \
+	$(top_builddir)/common/os/libos.la \
 	@X_PRE_LIBS@ @X_LIBS@ -lXext -lX11 @X_EXTRA_LIBS@ @GNUTLS_LIBS@ # @LIBINTL@
 
 if INCLUDED_ZLIB