1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/ppp_async.c b/drivers/net/ppp_async.c
index aa6540b39466..23659fd7c3a6 100644
--- a/drivers/net/ppp_async.c
+++ b/drivers/net/ppp_async.c
@@ -30,6 +30,7 @@
 #include <linux/ppp_channel.h>
 #include <linux/spinlock.h>
 #include <linux/init.h>
+#include <linux/jiffies.h>
 #include <asm/uaccess.h>
 #include <asm/string.h>
 
@@ -570,7 +571,7 @@ ppp_async_encode(struct asyncppp *ap)
                  * character if necessary.
                  */
                 if (islcp || flag_time == 0
-                    || jiffies - ap->last_xmit >= flag_time)
+                    || time_after_eq(jiffies, ap->last_xmit + flag_time))
                         *buf++ = PPP_FLAG;
                 ap->last_xmit = jiffies;
                 fcs = PPP_INITFCS;