diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d2588d6226e02..298c7691fb1d0 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7821,7 +7821,7 @@ static void __init find_zone_movable_pfns_for_nodes(void)
 
 			usable_startpfn = memblock_region_memory_base_pfn(r);
 
-			if (usable_startpfn < 0x100000) {
+			if (usable_startpfn < PHYS_PFN(SZ_4G)) {
 				mem_below_4gb_not_mirrored = true;
 				continue;
 			}