diff --git a/libcpu/mips/common/asm.h b/libcpu/mips/common/asm.h
index a16db1868e..6a5353b803 100644
--- a/libcpu/mips/common/asm.h
+++ b/libcpu/mips/common/asm.h
@@ -118,7 +118,7 @@ symbol		=	value
 /*
  * Macros to handle different pointer/register sizes for 32/64-bit code
  */
-#if defined SOC_LS2K1000
+#if defined ARCH_MIPS64
 /*
  * Size of a register
  */