diff --git a/README.md b/README.md
index 4f8861e3..b32a88b3 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Clone with --recursive to include submodules:
 ### Virtualenv
 Create a Python 3 virtual environment and activate it:
 ```
-$ virtualenv venv
+$ virtualenv venv -p python3
 $ source venv/bin/activate
 ```