diff --git a/apps/sdlan/src/sdlan_network.erl b/apps/sdlan/src/sdlan_network.erl
index c814e34..ed63a3e 100644
--- a/apps/sdlan/src/sdlan_network.erl
+++ b/apps/sdlan/src/sdlan_network.erl
@@ -627,5 +627,6 @@ chunk_rules(<<>>, _) ->
     [];
 chunk_rules(Bin, Size) when byte_size(Bin) =< Size ->
     [Bin];
-chunk_rules(<<Head:Size/binary, Tail/binary>>, Size) ->
+chunk_rules(Bin, Size) ->
+    <<Head:Size/binary, Tail/binary>> = Bin,
     [Head | chunk_rules(Tail, Size)].
\ No newline at end of file