diff --git a/include/asm-i386/e820.h b/include/asm-i386/e820.h
index ca82acb8cb1f7831d10bdc5fb135be8e85bf411a..f7514fb6e8e48d5deef18e316823bf95815922b2 100644
--- a/include/asm-i386/e820.h
+++ b/include/asm-i386/e820.h
@@ -18,7 +18,7 @@
 
 #define E820_RAM	1
 #define E820_RESERVED	2
-#define E820_ACPI	3 /* usable as RAM once ACPI tables have been read */
+#define E820_ACPI	3
 #define E820_NVS	4
 
 #define HIGH_MEMORY	(1024*1024)
diff --git a/include/asm-x86_64/e820.h b/include/asm-x86_64/e820.h
index 8dac397bf85ed6ba467032113641890cc5dd9a06..fd4198b496375e4c2487f21b127a93ff2d6f8e41 100644
--- a/include/asm-x86_64/e820.h
+++ b/include/asm-x86_64/e820.h
@@ -19,7 +19,7 @@
 
 #define E820_RAM	1
 #define E820_RESERVED	2
-#define E820_ACPI	3 /* usable as RAM once ACPI tables have been read */
+#define E820_ACPI	3
 #define E820_NVS	4
 
 #ifndef __ASSEMBLY__