1 files changed, 1 insertions, 1 deletions
diff --git a/lib.h b/lib.h
index 4558085a..92ae34df 100644
--- a/lib.h
+++ b/lib.h
@@ -500,7 +500,7 @@ extern val query_error_s, file_error_s, process_error_s, syntax_error_s;
 extern val timeout_error_s, system_error_s, alloc_error_s;
 extern val path_not_found_s, path_exists_s, path_permission_s;
 extern val warning_s, defr_warning_s, restart_s, continue_s;
-extern val gensym_counter_s;
+extern val gensym_counter_s, length_s;
 extern val rplaca_s, rplacd_s, seq_iter_s;
 
 #define gensym_counter (deref(lookup_var_l(nil, gensym_counter_s)))