diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index ba679ce..d15a071 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -44,6 +44,7 @@
 #include <linux/init.h>
 #include <linux/bitops.h>
 #include <linux/slab.h>
+#include <linux/ratelimit.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -242,8 +243,8 @@
 	while (readw(ofsAddr + FuncCode) != 0)
 		if (time_after(jiffies, end))
 			return;
-	if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
-		printk(KERN_WARNING "moxa function expired\n");
+	if (readw(ofsAddr + FuncCode) != 0)
+		printk_ratelimited(KERN_WARNING "moxa function expired\n");
 }
 
 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)