diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h
index 37df9ad7fd1a..d48b7a579ae1 100644
--- a/fs/xfs/linux-2.6/xfs_trace.h
+++ b/fs/xfs/linux-2.6/xfs_trace.h
@@ -1391,7 +1391,7 @@ DECLARE_EVENT_CLASS(xfs_alloc_class,
 		  __entry->wasfromfl,
 		  __entry->isfl,
 		  __entry->userdata,
-		  __entry->firstblock)
+		  (unsigned long long)__entry->firstblock)
 )
 
 #define DEFINE_ALLOC_EVENT(name) \