diff --git a/m4/sb_luajit.m4 b/m4/sb_luajit.m4
index 32e3ade..71e251e 100644
--- a/m4/sb_luajit.m4
+++ b/m4/sb_luajit.m4
@@ -60,6 +60,11 @@ AS_CASE([$host_os:$host_cpu],
           [
             LUAJIT_LIBS="$LUAJIT_LIBS -ldl"
             LUAJIT_LDFLAGS="-rdynamic"
+          ],
+        # -rdynamic are required on FreeBSD
+        [*freebsd*:*],
+          [
+            LUAJIT_LDFLAGS="-rdynamic"
           ]
 )