diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c
index 19afdbd7d0a77c8f5511cf2de616d24c5259dbae..5532d1be76879b452ca3c072de807eb4d9509b85 100644
--- a/arch/x86/kernel/tsc_msr.c
+++ b/arch/x86/kernel/tsc_msr.c
@@ -12,6 +12,7 @@
 #include <asm/setup.h>
 #include <asm/apic.h>
 #include <asm/param.h>
+#include <asm/tsc.h>
 
 #define MAX_NUM_FREQS	9