diff --git a/ext/pdo_dblib/config.m4 b/ext/pdo_dblib/config.m4
index 289eeb7c313e..694c44c7e7ab 100644
--- a/ext/pdo_dblib/config.m4
+++ b/ext/pdo_dblib/config.m4
@@ -45,9 +45,6 @@ if test "$PHP_PDO_DBLIB" != "no"; then
 
   PDO_DBLIB_DEFS="-DPDO_DBLIB_FLAVOUR=\\\"freetds\\\""
   PHP_NEW_EXTENSION(pdo_dblib, pdo_dblib.c dblib_driver.c dblib_stmt.c, $ext_shared,,-I$pdo_cv_inc_path $PDO_DBLIB_DEFS -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
-  AC_CHECK_LIB(dnet_stub, dnet_addr, [
-    PHP_ADD_LIBRARY_WITH_PATH(dnet_stub,,PDO_DBLIB_SHARED_LIBADD)
-  ])
   AC_DEFINE(HAVE_PDO_DBLIB,1,[ ])
   PHP_SUBST(PDO_DBLIB_SHARED_LIBADD)