diff --git a/unix/vncviewer/Makefile.am b/unix/vncviewer/Makefile.am
index 9690015..2b1e966 100644
--- a/unix/vncviewer/Makefile.am
+++ b/unix/vncviewer/Makefile.am
@@ -16,6 +16,6 @@
 	$(top_builddir)/common/rfb/librfb.la \
 	$(top_builddir)/common/network/libnetwork.la \
 	$(top_builddir)/common/rdr/librdr.la \
-	@X_PRE_LIBS@ @X_LIBS@ -lXext -lX11 @X_EXTRA_LIBS@ # @LIBINTL@
+	@X_PRE_LIBS@ @X_LIBS@ -lXext -lX11 @X_EXTRA_LIBS@ @GNUTLS_LIBS@ # @LIBINTL@
 
 EXTRA_DIST = vncviewer.man
diff --git a/unix/x0vncserver/Makefile.am b/unix/x0vncserver/Makefile.am
index c947257..80a27b3 100644
--- a/unix/x0vncserver/Makefile.am
+++ b/unix/x0vncserver/Makefile.am
@@ -19,6 +19,6 @@
 	$(top_builddir)/common/network/libnetwork.la \
 	$(top_builddir)/common/rdr/librdr.la \
 	$(top_builddir)/unix/tx/libtx.la @INET_LIB@ @X_PRE_LIBS@ @X_LIBS@ \
-	@XTEST_LIB@ -lXext -lX11 @X_EXTRA_LIBS@
+	@XTEST_LIB@ -lXext -lX11 @X_EXTRA_LIBS@ @GNUTLS_LIBS@
 
 EXTRA_DIST = x0vncserver.man