diff --git a/hwaccess.h b/hwaccess.h
index 2d17326..45629d2 100644
--- a/hwaccess.h
+++ b/hwaccess.h
@@ -292,7 +292,7 @@
   #endif
 #endif
 
-#if !defined(__DARWIN__) && !defined(__FreeBSD__) && !defined(__DragonFly__)
+#if !defined(__DARWIN__) && !defined(__FreeBSD__) && !defined(__DragonFly__) && !defined(__LIBPAYLOAD__)
 typedef struct { uint32_t hi, lo; } msr_t;
 msr_t rdmsr(int addr);
 int wrmsr(int addr, msr_t msr);
@@ -307,6 +307,16 @@
 msr_t freebsd_rdmsr(int addr);
 int freebsd_wrmsr(int addr, msr_t msr);
 #endif
+#if defined(__LIBPAYLOAD__)
+#include <arch/io.h>
+#include <arch/msr.h>
+typedef struct { uint32_t hi, lo; } msr_t;
+msr_t libpayload_rdmsr(int addr);
+int libpayload_wrmsr(int addr, msr_t msr);
+#undef rdmsr
+#define rdmsr libpayload_rdmsr
+#define wrmsr libpayload_wrmsr
+#endif
 
 #elif defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__) || defined(__ppc64__)