diff --git a/news/feat-clipboard-support.rst b/news/feat-clipboard-support.rst
index acd6e517e..061baf120 100644
--- a/news/feat-clipboard-support.rst
+++ b/news/feat-clipboard-support.rst
@@ -1,9 +1,9 @@
 **Added:**
 
 * support PTK's clipboard integration if pyperclip is installed.
-So that some common emacs like
-`cut/copy <https://github.com/prompt-toolkit/python-prompt-toolkit/blob/master/examples/prompts/system-clipboard-integration.py>`_
-will work out of the box.
+    So that some common emacs like
+    `cut/copy <https://github.com/prompt-toolkit/python-prompt-toolkit/blob/master/examples/prompts/system-clipboard-integration.py>`_
+    will work out of the box.
 
 
 **Changed:**
diff --git a/xonsh/ptk_shell/shell.py b/xonsh/ptk_shell/shell.py
index 002ad18e8..ec2fb65e2 100644
--- a/xonsh/ptk_shell/shell.py
+++ b/xonsh/ptk_shell/shell.py
@@ -38,9 +38,9 @@ from prompt_toolkit.styles.pygments import pygments_token_to_classname
 try:
     from prompt_toolkit.clipboard.pyperclip import PyperclipClipboard
 
-    SYS_CLIPBOARD = True
+    HAVE_SYS_CLIPBOARD = True
 except ImportError:
-    SYS_CLIPBOARD = False
+    HAVE_SYS_CLIPBOARD = False
 
 ANSI_OSC_PATTERN = re.compile("\x1b].*?\007")
 CAPITAL_PATTERN = re.compile(r"([a-z])([A-Z])")
@@ -154,7 +154,7 @@ class PromptToolkitShell(BaseShell):
         self.history = ThreadedHistory(PromptToolkitHistory())
 
         ptk_args = {"history": self.history}
-        if SYS_CLIPBOARD:
+        if HAVE_SYS_CLIPBOARD:
             ptk_args["clipboard"] = PyperclipClipboard()
         self.prompter = PromptSession(**ptk_args)