diff --git a/configure.ac b/configure.ac
index 3e9073d283a84d3680c654add9038fd5af3cb360..38d94d40a84274e6e530951e5ee7ad356358592c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2925,10 +2925,6 @@ AM_CONDITIONAL([WITH_VIRTUALPORT], [test "$with_virtualport" = "yes"])
 
 dnl netlink library
 
-LIBNL_ROUTE3_CFLAGS=""
-LIBNL_ROUTE3_LIBS=""
-LIBNL_CFLAGS=""
-LIBNL_LIBS=""
 have_libnl=no
 
 if test "$with_linux" = "yes"; then