diff --git a/examples/viewer/Makefile b/examples/viewer/Makefile
index 20ad72ca..f0401c5d 100644
--- a/examples/viewer/Makefile
+++ b/examples/viewer/Makefile
@@ -1,7 +1,7 @@
 
 COMPILER=g++
 CFLAGS=-g -I ../.. `pkg-config --cflags gtk+-2.0`
-LDFLAGS=-I ../.. `pkg-config --libs gtk+-2.0`
+LDFLAGS=-I ../.. `pkg-config --libs gtk+-2.0` -lgnutls -lgsasl
 
 
 viewer: viewer.o ../../libvmime-debug.a