Trivial spelling correction

Signed-off-by: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/ioengines.c b/ioengines.c
index cf8c2f1..d34d2f4 100644
--- a/ioengines.c
+++ b/ioengines.c
@@ -245,7 +245,7 @@
 	if (td->io_ops->init) {
 		ret = td->io_ops->init(td);
 		if (ret && td->o.iodepth > 1)
-			log_err("fio: io engine init failed. Perhaps try reducing io dpeth?\n");
+			log_err("fio: io engine init failed. Perhaps try reducing io depth?\n");
 	}
 
 	return ret;