diff --git a/apps/els_lsp/src/els_code_actions.erl b/apps/els_lsp/src/els_code_actions.erl
index 68ed67a8..830c3670 100644
--- a/apps/els_lsp/src/els_code_actions.erl
+++ b/apps/els_lsp/src/els_code_actions.erl
@@ -766,8 +766,6 @@ format_args(Document, Arity, Range) ->
     end.
 
 -spec guess_indentation([binary()]) -> pos_integer().
-guess_indentation([]) ->
-    2;
 guess_indentation([A, B | Rest]) ->
     ACount = count_leading_spaces(A, 0),
     BCount = count_leading_spaces(B, 0),
@@ -776,7 +774,9 @@ guess_indentation([A, B | Rest]) ->
             N;
         {_, _} ->
             guess_indentation([B | Rest])
-    end.
+    end;
+guess_indentation(_) ->
+    2.
 
 -spec count_leading_spaces(binary(), non_neg_integer()) -> non_neg_integer().
 count_leading_spaces(<<>>, _Acc) ->