diff --git a/libqservice/IQService.h b/libqservice/IQService.h
index 5054578..1f28cee 100644
--- a/libqservice/IQService.h
+++ b/libqservice/IQService.h
@@ -88,8 +88,8 @@
     };
 
     enum {
-        PREF_PARTIAL_UPDATE,
         PREF_POST_PROCESSING,
+        PREF_PARTIAL_UPDATE,
         ENABLE_PARTIAL_UPDATE,
     };