diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d4b58035674b..9e5bdeb90a69 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -27,7 +27,7 @@ cd mypy
 
 # Create then activate a virtual environment
 python3 -m venv venv
-source venv/bin/actiate
+source venv/bin/activate
 
 # Install the test requirements and the project
 python3 -m pip install -r test-requirements.txt