diff --git a/sys/vm/vm_phys.c b/sys/vm/vm_phys.c
index 51d33d66324f..6798c55cc91c 100644
--- a/sys/vm/vm_phys.c
+++ b/sys/vm/vm_phys.c
@@ -1646,10 +1646,10 @@ vm_phys_early_alloc(int domain, size_t alloc_size)
 	 * the phys_avail selection below.
 	 */
 	biggestsize = 0;
+	mem_index = 0;
 	mem_start = 0;
 	mem_end = -1;
 #ifdef NUMA
-	mem_index = 0;
 	if (mem_affinity != NULL) {
 		for (i = 0;; i++) {
 			size = mem_affinity[i].end - mem_affinity[i].start;