diff --git a/src/pmc/arccons.pmc b/src/pmc/arccons.pmc
index ad8ee4d..be9ffef 100644
--- a/src/pmc/arccons.pmc
+++ b/src/pmc/arccons.pmc
@@ -22,7 +22,7 @@ pmclass ArcCons
 
 	VTABLE void init() {
 		PMC_data(SELF) = mem_allocate_zeroed_typed(Parrot_ArcCons_attributes);
-		PObj_custom_mark_SET(SELF);
+		PObj_custom_mark_destroy_SETALL(SELF);
 	}
 	
 	VTABLE void mark() {
@@ -31,14 +31,16 @@ pmclass ArcCons
 			pobject_lives(INTERP, (PObj *)c->the_car);
 		if (c->the_cdr)
 			pobject_lives(INTERP, (PObj *)c->the_cdr);
-		/*
-		PMC *obj;
-		GET_ATTR_the_car(INTERP, SELF, obj);
-		pobject_lives(INTERP, (PObj*)obj);
-		GET_ATTR_the_cdr(INTERP, SELF, obj);
-		pobject_lives(INTERP, (PObj*)obj);*/
 	}
-
+	
+	VTABLE void destroy() {
+		Parrot_ArcCons_attributes *c = PARROT_ARCCONS(SELF);
+		if (c) {
+			mem_sys_free(c);
+			PMC_data(SELF) = NULL;
+		}
+	}
+	
 	VTABLE STRING* name() {
 		return Parrot_str_new_constant(INTERP, "cons");
 	}
diff --git a/src/pmc/arcsym.pmc b/src/pmc/arcsym.pmc
index df9d10e..8bb34d9 100644
--- a/src/pmc/arcsym.pmc
+++ b/src/pmc/arcsym.pmc
@@ -10,13 +10,21 @@ pmclass ArcSym
 	VTABLE void init() {
 		Parrot_ArcSym_attributes *u = mem_allocate_zeroed_typed(Parrot_ArcSym_attributes);
 		PMC_data(SELF) = u;
-		PObj_custom_mark_SET(SELF);
+		PObj_custom_mark_destroy_SETALL(SELF);
 	}
 	
 	VTABLE void mark() {
 		Parrot_ArcSym_attributes *s = PARROT_ARCSYM(SELF);
 		if (s->repr)
 			pobject_lives(INTERP, (PObj *)s->repr);
+
+	}
+	VTABLE void destroy() {
+		Parrot_ArcSym_attributes *s = PARROT_ARCSYM(SELF);
+		if (s) {
+			mem_sys_free(s);
+			PMC_data(SELF) = NULL;
+		}
 	}
 
 	VTABLE STRING* name() {