diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c
index dc7bf1b..1a511e9f 100644
--- a/arch/sparc64/kernel/unaligned.c
+++ b/arch/sparc64/kernel/unaligned.c
@@ -7,6 +7,7 @@
  */
 
 
+#include <linux/jiffies.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
@@ -283,7 +284,7 @@
 {
 	static unsigned long count, last_time;
 
-	if (jiffies - last_time > 5 * HZ)
+	if (time_after(jiffies, last_time + 5 * HZ))
 		count = 0;
 	if (count < 5) {
 		last_time = jiffies;