diff --git a/src/vm/fzl_vm.c b/src/vm/fzl_vm.c
index 5c5efd5..9c8f041 100644
--- a/src/vm/fzl_vm.c
+++ b/src/vm/fzl_vm.c
@@ -281,6 +281,7 @@ int fzl_vm_run(fzl_vm_t *vm)
         break;
       }
 
+      // NOTE: make recursive owning transfer for nested objects!
       case FZL_OPCODE_ESCAPE_OBJECT:
       {
         if (vm->dtop < 1)
@@ -291,7 +292,7 @@ int fzl_vm_run(fzl_vm_t *vm)
           return -1;
         }
         fzl_value_t obj = vm->dstack[--vm->dtop];
-        if (obj.type != FZL_TYPE_OBJECT)
+        if (obj.type != FZL_TYPE_OBJECT && obj.type < FZL_TYPE_INT8)
         {
           snprintf(last_err, sizeof(last_err),
                    "runtime error - cannot escape non-object type");
@@ -310,13 +311,16 @@ int fzl_vm_run(fzl_vm_t *vm)
         }
 
         bool found = false;
-        for (size_t i = 0; i < current->owned_objects_count; i++)
+        if (obj.as.u != 0)
         {
-          if (obj.as.obj == current->owned_objects[i])
+          for (size_t i = 0; i < current->owned_objects_count; i++)
           {
-            found                     = true;
-            current->owned_objects[i] = NULL;
-            break;
+            if (obj.as.obj == current->owned_objects[i])
+            {
+              found                     = true;
+              current->owned_objects[i] = NULL;
+              break;
+            }
           }
         }