1 files changed, 1 insertions, 1 deletions
diff --git a/aclocal.m4 b/aclocal.m4
index 746d5df5..1613d680 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -155,7 +155,7 @@ AC_DEFUN([BIRD_CHECK_LTO],
   bird_tmp_cflags="$CFLAGS"
   bird_tmp_ldflags="$LDFLAGS"
   CFLAGS="-flto"
-  LDFLAGS="-flto"
+  LDFLAGS="-flto=4"
 
   AC_CACHE_CHECK(
     [whether link time optimizer is available],