1 files changed, 2 insertions, 0 deletions
diff --git a/gc.h b/gc.h
index 1e67e723..326c5f87 100644
--- a/gc.h
+++ b/gc.h
@@ -47,6 +47,8 @@ val gc_mutated(val);
 extern int full_gc;
 #endif
 
+val valid_object_p(val obj);
+
 void unmark(void);
 void gc_cancel(void);
 void gc_hint_func(val *);