diff --git a/deploy_tools/fabfile.py b/deploy_tools/fabfile.py
index cde8c2f..0e70c1c 100644
--- a/deploy_tools/fabfile.py
+++ b/deploy_tools/fabfile.py
@@ -42,7 +42,7 @@ def _update_settings(source_folder, site_name):
 
 def _update_virtualenv(source_folder):
     virtualenv_folder = source_folder + '/../virtualenv'
-    if not exists(virtualenv_folder + 'bin/pip'):
+    if not exists(virtualenv_folder + '/bin/pip'):
         run('virtualenv --python=python3 %s' % (virtualenv_folder,))
     run('%s/bin/pip install -r %s/requirements.txt' % (
             virtualenv_folder, source_folder