diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index 0ee33ca6f1..10ba2f184e 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -43,7 +43,7 @@ class TestEnumerator < Test::Unit::TestCase
     }
   end
 
-  def test_nested_itaration
+  def test_nested_iteration
     def (o = Object.new).each
       yield :ok1
       yield [:ok2, :x].each.next
diff --git a/vm.c b/vm.c
index 71d282d579..2cc8c5aaba 100644
--- a/vm.c
+++ b/vm.c
@@ -1216,7 +1216,7 @@ vm_exec(rb_thread_t *th)
       vm_loop_start:
 	result = vm_exec_core(th, initial);
 	if ((state = th->state) != 0) {
-#ifdef __llvm__ /* LLVM optimization guard for TestEnumerator#test_nested_itaration */
+#ifdef __llvm__ /* LLVM optimization guard for TestEnumerator#test_nested_iteration */
 	    (void)__extension__({rb_thread_t t = *th; t;});
 #endif
 	    err = result;