1 files changed, 1 insertions, 1 deletions

diff --git a/src/bootstrap/objects.h b/src/bootstrap/objects.h
index 5968a44..ed623eb 100644
--- a/src/bootstrap/objects.h
+++ b/src/bootstrap/objects.h
@@ -65,7 +65,7 @@ void display(Object *root);
 void display_pair(Object *root);
 
 // Object comparison.
-bool obj_eq(Object *a, Object* b);
+bool obj_eq(const Object *a, const Object* b);
 
 // Utility macros.
 #define DEBUG_OBJ(MSG,OBJ) printf((MSG)); display(OBJ); printf("\n");