fix

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp.h b/lisp.h
index 631cee4..fdf4027 100644
--- a/lisp.h
+++ b/lisp.h
@@ -35,7 +35,7 @@ reg *reg_add(value *val);
 extern reg *global_reg;
 void mark_env(env *e);
 void mark_val(value *v);
-int sweep();
+void sweep();
 void free_env(env *e);
 void free_value(value *v);
 void reset_env_marks(env *e);