diff --git a/configure.in b/configure.in
index c71dbd8dd..a676ffb25 100644
--- a/configure.in
+++ b/configure.in
@@ -87,8 +87,6 @@ AC_PROG_LIBTOOL
 AC_CHECK_LIB([ltdl], [lt_dlinit], ,
   [AC_MSG_ERROR([libltdl not found.  See README.])])
 
-AC_SUBST(DLPREOPEN)
-
 AC_CHECK_PROG(have_makeinfo, makeinfo, yes, no)
 AM_CONDITIONAL(HAVE_MAKEINFO, test "$have_makeinfo" = yes)