diff --git a/src/main/java/com/google/devtools/build/lib/starlarkbuildapi/python/PyRuntimeInfoApi.java b/src/main/java/com/google/devtools/build/lib/starlarkbuildapi/python/PyRuntimeInfoApi.java
index 9a178cee3a9a11..743bb888624bd7 100644
--- a/src/main/java/com/google/devtools/build/lib/starlarkbuildapi/python/PyRuntimeInfoApi.java
+++ b/src/main/java/com/google/devtools/build/lib/starlarkbuildapi/python/PyRuntimeInfoApi.java
@@ -45,7 +45,7 @@
     category = DocCategory.PROVIDER)
 public interface PyRuntimeInfoApi<FileT extends FileApi> extends StarlarkValue {
 
-  static final String DEFAULT_STUB_SHEBANG = "#!/usr/bin/env python";
+  static final String DEFAULT_STUB_SHEBANG = "#!/usr/bin/env python3";
 
   @StarlarkMethod(
       name = "interpreter_path",