Added check for ln.

diff --git a/configure.ac b/configure.ac
index 803bd92..70b9408 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,6 +78,7 @@
 AC_CHECK_TOOL(WINDRES,windres,false)
 AC_PROG_INSTALL
 AC_PROG_LN_S
+WINE_PROG_LN
 AC_CHECK_PROG(C2MAN,c2man,c2man,\$(TOPSRCDIR)/tools/c2man.pl)
 AC_PATH_PROG(LDCONFIG, ldconfig, true, [/sbin /usr/sbin $PATH])