diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 39f3dfe..c6a063b 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -331,6 +331,7 @@
 	/*
 	 * Determine low and high memory ranges
 	 */
+	max_pfn = max_low_pfn;
 	if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
 #ifdef CONFIG_HIGHMEM
 		highstart_pfn = PFN_DOWN(HIGHMEM_START);