diff --git a/libnautilus-adapter/nautilus-adapter-factory.idl b/libnautilus-adapter/nautilus-adapter-factory.idl
index 5d156202e..326b2fdb3 100644
--- a/libnautilus-adapter/nautilus-adapter-factory.idl
+++ b/libnautilus-adapter/nautilus-adapter-factory.idl
@@ -26,8 +26,8 @@
  *                     that are not Nautilus::Views as Nautilus::View objects.
  */
 
-#ifndef NAUTUILUS_ADAPTER_FACTORY_IDL
-#define NAUTUILUS_ADAPTER_FACTORY_IDL
+#ifndef NAUTILUS_ADAPTER_FACTORY_IDL
+#define NAUTILUS_ADAPTER_FACTORY_IDL
 
 #include <Bonobo.idl>
 #include <libnautilus/nautilus-view-component.idl>
@@ -41,4 +41,4 @@ module Nautilus {
 
 };
 
-#endif /* NAUTUILUS_ADAPTER_FACTORY_IDL */
+#endif /* NAUTILUS_ADAPTER_FACTORY_IDL */