diff --git a/arch/x86/include/asm/e820/api.h b/arch/x86/include/asm/e820/api.h
index b45550b662a99e1c9663da1771880cd9c7d2181d..4163a83f1a374b75400c1867e4ee3fc39aedc526 100644
--- a/arch/x86/include/asm/e820/api.h
+++ b/arch/x86/include/asm/e820/api.h
@@ -48,5 +48,4 @@ static inline bool is_ISA_range(u64 start, u64 end)
 
 #include <linux/ioport.h>
 
-#define HIGH_MEMORY	(1024*1024)
 #endif /* _ASM_E820_API_H */
diff --git a/arch/x86/include/asm/e820/types.h b/arch/x86/include/asm/e820/types.h
index 464cfe8273960e0fd300ee1deeaa51553d5fa414..ce0e100b843c2dc8285b67c1b4ad48ba69558e1a 100644
--- a/arch/x86/include/asm/e820/types.h
+++ b/arch/x86/include/asm/e820/types.h
@@ -74,7 +74,7 @@ struct e820map {
 };
 
 /*
- * Various legacy ranges in physical memory:
+ * Various well-known legacy memory ranges in physical memory:
  */
 #define ISA_START_ADDRESS	0x000a0000
 #define ISA_END_ADDRESS		0x00100000
@@ -82,6 +82,8 @@ struct e820map {
 #define BIOS_BEGIN		0x000a0000
 #define BIOS_END		0x00100000
 
+#define HIGH_MEMORY		0x00100000
+
 #define BIOS_ROM_BASE		0xffe00000
 #define BIOS_ROM_END		0xffffffff