diff --git a/python/taichi/lang/__init__.py b/python/taichi/lang/__init__.py
index 27d9944196bac0..2ba2346290312d 100644
--- a/python/taichi/lang/__init__.py
+++ b/python/taichi/lang/__init__.py
@@ -106,6 +106,7 @@ def boolean_config(key, name=None):
 
   # does override
   boolean_config("print_ir")
+  boolean_config("print_preprocessed")
   boolean_config("verbose")
   boolean_config("fast_math")
   arch = os.environ.get("TI_ARCH")