diff --git a/lib/cretonne/meta/check.sh b/lib/cretonne/meta/check.sh
index c7fd511ec1..655092e6cb 100755
--- a/lib/cretonne/meta/check.sh
+++ b/lib/cretonne/meta/check.sh
@@ -15,7 +15,7 @@ runif() {
 runif flake8 .
 
 # Type checking.
-runif python3 -m mypy --py2 build.py
+runif mypy --py2 build.py
 
 # Python unit tests.
 runif python -m unittest discover