diff -up smproxy-1.0.4/configure.ac.jx smproxy-1.0.4/configure.ac
--- smproxy-1.0.4/configure.ac.jx	2012-07-23 12:52:23.000000000 -0400
+++ smproxy-1.0.4/configure.ac	2012-07-23 12:56:08.495116924 -0400
@@ -38,6 +38,6 @@ XORG_DEFAULT_OPTIONS
 AC_CHECK_FUNCS([mkstemp])
 
 # Checks for pkg-config packages
-PKG_CHECK_MODULES(SMPROXY, sm xt xmuu)
+PKG_CHECK_MODULES(SMPROXY, ice sm xt xmuu)
 
 AC_OUTPUT([Makefile])