diff --git a/Running-ssh-and-sshd.md b/Running-ssh-and-sshd.md
index 813019c..c8234ac 100644
--- a/Running-ssh-and-sshd.md
+++ b/Running-ssh-and-sshd.md
@@ -1,3 +1,5 @@
+copy zlib1.dll from zlib source direcotry to openssh directory
+
 #### Running SSH server:
 
 1. Download Service Manager tool NSSM