diff --git a/tools/memory-model/Documentation/explanation.txt b/tools/memory-model/Documentation/explanation.txt
index f9d610d5a1a4cddd6058cdcb3acef991eb15bceb..5d72f3112e5657bbbacc0849545cd17b09eede32 100644
--- a/tools/memory-model/Documentation/explanation.txt
+++ b/tools/memory-model/Documentation/explanation.txt
@@ -2510,7 +2510,7 @@ they behave as follows:
 	smp_mb__after_atomic() orders po-earlier atomic updates and
 	the events preceding them against all po-later events;
 
-	smp_mb_after_spinlock() orders po-earlier lock acquisition
+	smp_mb__after_spinlock() orders po-earlier lock acquisition
 	events and the events preceding them against all po-later
 	events.