diff --git a/docs/docsite/rst/user_guide/vault.rst b/docs/docsite/rst/user_guide/vault.rst
index cb4ae48e90c..ae0618748ed 100644
--- a/docs/docsite/rst/user_guide/vault.rst
+++ b/docs/docsite/rst/user_guide/vault.rst
@@ -218,7 +218,7 @@ To encrypt the string 'letmein' read from stdin, add the vault ID 'test' using t
 
 The command above creates this output::
 
-    Reading plaintext input from stdin. (ctrl-d to end input)
+    Reading plaintext input from stdin. (ctrl-d to end input, twice if your content does not already have a new line)
     db_password: !vault |
               $ANSIBLE_VAULT;1.2;AES256;dev
               61323931353866666336306139373937316366366138656131323863373866376666353364373761
@@ -237,7 +237,7 @@ The command above triggers this prompt:
 
 .. code-block:: text
 
-    Reading plaintext input from stdin. (ctrl-d to end input)
+    Reading plaintext input from stdin. (ctrl-d to end input, twice if your content does not already have a new line)
 
 Type the string to encrypt (for example, 'hunter2'), hit ctrl-d, and wait.
 
diff --git a/lib/ansible/cli/vault.py b/lib/ansible/cli/vault.py
index e80318b70ee..c20613b3f0d 100644
--- a/lib/ansible/cli/vault.py
+++ b/lib/ansible/cli/vault.py
@@ -312,7 +312,7 @@ class VaultCLI(CLI):
         # read from stdin
         if self.encrypt_string_read_stdin:
             if sys.stdout.isatty():
-                display.display("Reading plaintext input from stdin. (ctrl-d to end input)", stderr=True)
+                display.display("Reading plaintext input from stdin. (ctrl-d to end input, twice if your content does not already have a newline)", stderr=True)
 
             stdin_text = sys.stdin.read()
             if stdin_text == '':