diff --git a/docker/etc/s6/openssh/setup b/docker/etc/s6/openssh/setup
index b529431a15..f8ef816a95 100755
--- a/docker/etc/s6/openssh/setup
+++ b/docker/etc/s6/openssh/setup
@@ -6,7 +6,7 @@ fi
 
 if [ ! -f /data/ssh/ssh_host_ed25519_key ]; then
     echo "Generating /data/ssh/ssh_host_ed25519_key..."
-    ssh-keygen -t ed25519 -b 4096 -f /data/ssh/ssh_host_ed25519_key -N "" > /dev/null
+    ssh-keygen -t ed25519 -f /data/ssh/ssh_host_ed25519_key -N "" > /dev/null
 fi
 
 if [ ! -f /data/ssh/ssh_host_rsa_key ]; then