diff --git a/packages/@aws-cdk/aws-lambda-python-alpha/lib/function.ts b/packages/@aws-cdk/aws-lambda-python-alpha/lib/function.ts
index 7105c088be82a..4dd3a23e06dc7 100644
--- a/packages/@aws-cdk/aws-lambda-python-alpha/lib/function.ts
+++ b/packages/@aws-cdk/aws-lambda-python-alpha/lib/function.ts
@@ -18,8 +18,6 @@ export interface PythonFunctionProps extends FunctionOptions {
   /**
    * The runtime environment. Only runtimes of the Python family are
    * supported.
-   *
-   * @default Runtime.PYTHON_3_7
    */
   readonly runtime: Runtime;