diff --git a/lib/iomap.c b/lib/iomap.c
index a57d262..5dfcbde 100644
--- a/lib/iomap.c
+++ b/lib/iomap.c
@@ -40,7 +40,7 @@ static void bad_io_access(unsigned long port, const char *access)
static int count = 10;
if (count) {
count--;
- printk(KERN_ERR "Bad IO access at port %lx (%s)\n", port, access);
+ printk(KERN_ERR "Bad IO access at port %#lx (%s)\n", port, access);
WARN_ON(1);
}
}