diff --git a/arch/x86/cpu/mtrr.c b/arch/x86/cpu/mtrr.c
index a00db42..a43cb7f 100644
--- a/arch/x86/cpu/mtrr.c
+++ b/arch/x86/cpu/mtrr.c
@@ -17,6 +17,7 @@
  */
 
 #include <common.h>
+#include <cpu_func.h>
 #include <asm/io.h>
 #include <asm/msr.h>
 #include <asm/mtrr.h>