diff --git a/disk-utils/mkswap.8 b/disk-utils/mkswap.8
index a6ab8530d..27f922171 100644
--- a/disk-utils/mkswap.8
+++ b/disk-utils/mkswap.8
@@ -124,10 +124,12 @@ e.g.\& using a command like
 
 .nf
 .RS
-# fallocate \-\-length 8GiB swapfile
+# dd if=/dev/zero of=swapfile bs=1MiB count=$((8*1024))
 .RE
 .fi
 
+to create 8GiB swapfile.
+
 Note that a swap file must not contain any holes.  Using
 .BR cp (1)
 to create the file is not acceptable.  Neither is use of