diff --git a/sys/dev/hwpmc/hwpmc_core.c b/sys/dev/hwpmc/hwpmc_core.c
index a2607ca1d9e..5d6ca02ea79 100644
--- a/sys/dev/hwpmc/hwpmc_core.c
+++ b/sys/dev/hwpmc/hwpmc_core.c
@@ -472,8 +472,7 @@ iaf_stop_pmc(int cpu, int ri)
 	cc->pc_iafctrl &= ~(IAF_MASK << (ri * 4));
 	wrmsr(IAF_CTRL, cc->pc_iafctrl);
 
-	cc->pc_globalctrl &= ~(1ULL << (ri + IAF_OFFSET));
-	wrmsr(IA_GLOBAL_CTRL, cc->pc_globalctrl);
+	/* Don't need to write IA_GLOBAL_CTRL, one disable is enough. */
 
 	PMCDBG4(MDP,STO,1,"iafctrl=%x(%x) globalctrl=%jx(%jx)",
 	    cc->pc_iafctrl, (uint32_t) rdmsr(IAF_CTRL),
@@ -975,10 +974,7 @@ iap_stop_pmc(int cpu, int ri)
 
 	wrmsr(IAP_EVSEL0 + ri, 0);
 
-	if (core_version >= 2) {
-		cc->pc_globalctrl &= ~(1ULL << ri);
-		wrmsr(IA_GLOBAL_CTRL, cc->pc_globalctrl);
-	}
+	/* Don't need to write IA_GLOBAL_CTRL, one disable is enough. */
 
 	return (0);
 }
diff --git a/sys/dev/hwpmc/hwpmc_uncore.c b/sys/dev/hwpmc/hwpmc_uncore.c
index f69b21e173d..0d9085564c2 100644
--- a/sys/dev/hwpmc/hwpmc_uncore.c
+++ b/sys/dev/hwpmc/hwpmc_uncore.c
@@ -366,8 +366,7 @@ ucf_stop_pmc(int cpu, int ri)
 	PMCDBG1(MDP,STO,1,"ucf-stop ucfctrl=%x", ucfc->pc_ucfctrl);
 	wrmsr(UCF_CTRL, ucfc->pc_ucfctrl);
 
-	ucfc->pc_globalctrl &= ~(1ULL << (ri + SELECTOFF(uncore_cputype)));
-	wrmsr(UC_GLOBAL_CTRL, ucfc->pc_globalctrl);
+	/* Don't need to write UC_GLOBAL_CTRL, one disable is enough. */
 
 	PMCDBG4(MDP,STO,1,"ucfctrl=%x(%x) globalctrl=%jx(%jx)",
 	    ucfc->pc_ucfctrl, (uint32_t) rdmsr(UCF_CTRL),
@@ -724,8 +723,7 @@ ucp_stop_pmc(int cpu, int ri)
 	/* stop hw. */
 	wrmsr(SELECTSEL(uncore_cputype) + ri, 0);
 
-	cc->pc_globalctrl &= ~(1ULL << ri);
-	wrmsr(UC_GLOBAL_CTRL, cc->pc_globalctrl);
+	/* Don't need to write UC_GLOBAL_CTRL, one disable is enough. */
 
 	return (0);
 }