diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 311b4dc..393b60c 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -662,7 +662,7 @@
 	int  (*commit_txn)	(struct pmu *pmu); /* optional */
 	/*
 	 * Will cancel the transaction, assumes ->del() is called
-	 * for each successfull ->add() during the transaction.
+	 * for each successful ->add() during the transaction.
 	 */
 	void (*cancel_txn)	(struct pmu *pmu); /* optional */
 };