diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 23b079fb93fc0e237438aed52b3a1b46e8ab33b8..4bd89218cbc3799613ccaf8316f1cbb87fa86103 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -890,7 +890,7 @@ void __init setup_arch(char **cmdline_p)
 
 	cleanup_highmap();
 
-	memblock.current_limit = get_max_mapped();
+	memblock.current_limit = ISA_END_ADDRESS;
 	memblock_x86_fill();
 
 	/*