diff --git a/usr.bin/top/machine.c b/usr.bin/top/machine.c
index b7186a6c2c2e..476432e5db0c 100644
--- a/usr.bin/top/machine.c
+++ b/usr.bin/top/machine.c
@@ -282,10 +282,7 @@ machine_init(struct statics *statics)
 	size_t size;
 
 	size = sizeof(smpmode);
-	if ((sysctlbyname("machdep.smp_active", &smpmode, &size,
-	    NULL, 0) != 0 &&
-	    sysctlbyname("kern.smp.active", &smpmode, &size,
-	    NULL, 0) != 0) ||
+	if (sysctlbyname("kern.smp.active", &smpmode, &size, NULL, 0) != 0 ||
 	    size != sizeof(smpmode))
 		smpmode = 0;