diff --git a/include/linux/timex.h b/include/linux/timex.h
index 7e050a2..04a4a8c 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -282,6 +282,13 @@
 	return !(time_status & STA_UNSYNC);
 }
 
+/* Required to safely shift negative values */
+#define shift_right(x, s) ({	\
+	__typeof__(x) __x = (x);	\
+	__typeof__(s) __s = (s);	\
+	__x < 0 ? -(-__x >> __s) : __x >> __s;	\
+})
+
 
 #ifdef CONFIG_TIME_INTERPOLATION