diff --git a/vm/instructions.rb b/vm/instructions.rb
index 92c9c0c..9f2d349 100644
--- a/vm/instructions.rb
+++ b/vm/instructions.rb
@@ -3829,23 +3829,10 @@ class Instructions
   def shift_array
     <<-CODE
     Array* array = as<Array>(stack_pop());
-    size_t size = (size_t)array->size();

-    if(size == 0) {
-      stack_push(array);
-      stack_push(Qnil);
-    } else {
-      size_t j = size - 1;
-      Object* shifted_value = array->get(state, 0);
-      Array* smaller_array = Array::create(state, j);
-
-      for(size_t i = 0; i < j; i++) {
-        smaller_array->set(state, i, array->get(state, i+1));
-      }
-
-      stack_push(smaller_array);
-      stack_push(shifted_value);
-    }
+    Object *val = array->shift(state);
+    stack_push(array);
+    stack_push(val);
     CODE
   end