diff --git a/arch/x86/include/asm/mtrr.h b/arch/x86/include/asm/mtrr.h
index 14080d22edb30221300547c855923089c80b8678..a51ada8467de36ddcf729b7f099455225842d28a 100644
--- a/arch/x86/include/asm/mtrr.h
+++ b/arch/x86/include/asm/mtrr.h
@@ -23,6 +23,7 @@
 #ifndef _ASM_X86_MTRR_H
 #define _ASM_X86_MTRR_H
 
+#include <linux/types.h>
 #include <linux/ioctl.h>
 #include <linux/errno.h>