diff -up openssh-5.3p1/contrib/Makefile.dso openssh-5.3p1/contrib/Makefile
--- openssh-5.3p1/contrib/Makefile.dso	2010-02-15 11:51:53.000000000 +0100
+++ openssh-5.3p1/contrib/Makefile	2010-02-15 11:54:47.000000000 +0100
@@ -9,7 +9,7 @@ gnome-ssh-askpass1: gnome-ssh-askpass1.c
 gnome-ssh-askpass2: gnome-ssh-askpass2.c
 	$(CC) `pkg-config --cflags gtk+-2.0` \
 		gnome-ssh-askpass2.c -o gnome-ssh-askpass2 \
-		`pkg-config --libs gtk+-2.0`
+		`pkg-config --libs gtk+-2.0` -lX11
 
 clean:
 	rm -f *.o gnome-ssh-askpass1 gnome-ssh-askpass2 gnome-ssh-askpass