diff --git a/src/include/cpu/amd/mtrr.h b/src/include/cpu/amd/mtrr.h
index bc3f313f42..f1b95b6636 100644
--- a/src/include/cpu/amd/mtrr.h
+++ b/src/include/cpu/amd/mtrr.h
@@ -37,9 +37,6 @@
 #define TOP_MEM2	0xC001001Dul
 #endif
 
-#define TOP_MEM_MASK			0x007fffff
-#define TOP_MEM_MASK_KB			(TOP_MEM_MASK >> 10)
-
 #if !defined(__ASSEMBLER__)
 
 #include <cpu/x86/msr.h>