diff --git a/arch/mips/include/asm/const.h b/arch/mips/include/asm/const.h
index f600e7a5b7565606e2a7b9b4e2d28f44c601c9b2..0a7eb8322320c6526473cc16899030ecd6af2957 100644
--- a/arch/mips/include/asm/const.h
+++ b/arch/mips/include/asm/const.h
@@ -17,11 +17,8 @@
  */
 
 #ifdef __ASSEMBLY__
-#define _AC(X,Y)	X
 #define _AT(T,X)	X
 #else
-#define __AC(X,Y)	(X##Y)
-#define _AC(X,Y)	__AC(X,Y)
 #define _AT(T,X)	((T)(X))
 #endif