diff --git a/docs/docsite/rst/vault.rst b/docs/docsite/rst/vault.rst
index 87f4ff391a..d63a34aa24 100644
--- a/docs/docsite/rst/vault.rst
+++ b/docs/docsite/rst/vault.rst
@@ -155,7 +155,7 @@ To encrypt a string read from stdin and name it 'db_password':
 
 .. code-block:: bash
 
-    echo 'letmein' | ansible-vault encrypt_string --vault-id dev@password --stdin-name 'db_password'
+    echo -n 'letmein' | ansible-vault encrypt_string --vault-id dev@password --stdin-name 'db_password'
 
 Result::