diff --git a/sys/i386/include/specialreg.h b/sys/i386/include/specialreg.h
index 71c43b3550d9..c4442da1852d 100644
--- a/sys/i386/include/specialreg.h
+++ b/sys/i386/include/specialreg.h
@@ -154,6 +154,9 @@
 #define MSR_MCG_CTL		0x17b
 #define MSR_EVNTSEL0		0x186
 #define MSR_EVNTSEL1		0x187
+#define MSR_THERM_CONTROL	0x19a
+#define MSR_THERM_INTERRUPT	0x19b
+#define MSR_THERM_STATUS	0x19c
 #define MSR_DEBUGCTLMSR		0x1d9
 #define MSR_LASTBRANCHFROMIP	0x1db
 #define MSR_LASTBRANCHTOIP	0x1dc