diff -r c0a9fb3e19b9 -r 61f5895a4b24 Lib/venv/scripts/nt/Activate.ps1
--- a/Lib/venv/scripts/nt/Activate.ps1  Mon Jan 23 12:29:47 2017 +0200
+++ b/Lib/venv/scripts/nt/Activate.ps1  Mon Jan 23 16:05:38 2017 +0000
@@ -26,16 +26,18 @@
 }
 
 deactivate -nondestructive
-
+
 $env:VIRTUAL_ENV="__VENV_DIR__"
 
-# Set the prompt to include the env name
-# Make sure _OLD_VIRTUAL_PROMPT is global
-function global:_OLD_VIRTUAL_PROMPT {""}
-copy-item function:prompt function:_OLD_VIRTUAL_PROMPT
-function global:prompt {
-    Write-Host -NoNewline -ForegroundColor Green '__VENV_PROMPT__'
-    _OLD_VIRTUAL_PROMPT
+if (! $env:VIRTUAL_ENV_DISABLE_PROMPT) {
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT {""}
+    copy-item function:prompt function:_OLD_VIRTUAL_PROMPT
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green '__VENV_PROMPT__'
+        _OLD_VIRTUAL_PROMPT
+    }
 }
 
 # Clear PYTHONHOME