diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index 24ee113959f6c556d8f50a098aed145f6fdc6367..21745fd662d68420c5f9775898d8948a2e5edbd5 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -664,8 +664,8 @@ struct x86_pmu {
 	/*
 	 * Intel LBR
 	 */
-	unsigned long	lbr_tos, lbr_from, lbr_to; /* MSR base regs       */
-	int		lbr_nr;			   /* hardware stack size */
+	unsigned int	lbr_tos, lbr_from, lbr_to,
+			lbr_nr;			   /* LBR base regs and size */
 	u64		lbr_sel_mask;		   /* LBR_SELECT valid bits */
 	const int	*lbr_sel_map;		   /* lbr_select mappings */
 	bool		lbr_double_abort;	   /* duplicated lbr aborts */