diff --git a/doc/source/install/manual_install.rst b/doc/source/install/manual_install.rst
index 0edb431f86..183084043b 100644
--- a/doc/source/install/manual_install.rst
+++ b/doc/source/install/manual_install.rst
@@ -120,7 +120,7 @@ Install virtualenv, create environment and activate it:
 
     $ pip install virtualenv --user
     $ virtualenv --system-site-packages env
-    $ source env/bin/activate
+    $ . env/bin/activate
 
 Get Trove
 ---------
diff --git a/tools/install_venv.py b/tools/install_venv.py
index 04e174b1f3..f53310711b 100755
--- a/tools/install_venv.py
+++ b/tools/install_venv.py
@@ -126,7 +126,7 @@ def print_help():
     To activate the Trove virtualenv for the extent of your current shell
     session you can run:
 
-    $ source .venv/bin/activate
+    $ . .venv/bin/activate
 
     Or, if you prefer, you can run commands in the virtualenv on a case by case
     basis by running: