diff --git a/unix/xserver/hw/vnc/Makefile.am b/unix/xserver/hw/vnc/Makefile.am
index d7ab259..fb477c5 100644
--- a/unix/xserver/hw/vnc/Makefile.am
+++ b/unix/xserver/hw/vnc/Makefile.am
@@ -5,6 +5,7 @@ RFB_LIB=$(LIB_DIR)/rfb/librfb.la
 RDR_LIB=$(LIB_DIR)/rdr/librdr.la
 NETWORK_LIB=$(LIB_DIR)/network/libnetwork.la
 XREGION_LIB=$(LIB_DIR)/Xregion/libXregion.la
+OS_LIB=$(LIB_DIR)/os/libos.la
 COMMON_LIBS=$(NETWORK_LIB) $(RFB_LIB) $(RDR_LIB) $(XREGION_LIB)

 noinst_LTLIBRARIES = libvnccommon.la
@@ -64,6 +65,6 @@ libvnc_la_CPPFLAGS = $(XVNC_CPPFLAGS) -I$(TIGERVNC_SRCDIR)/common -UHAVE_CONFIG_

 libvnc_la_LDFLAGS = -module -avoid-version -Wl,-z,now

-libvnc_la_LIBADD = libvnccommon.la $(COMMON_LIBS)
+libvnc_la_LIBADD = libvnccommon.la $(COMMON_LIBS) $(OS_LIB)

 EXTRA_DIST = Xvnc.man