diff --git a/python/taichi/lang/kernel.py b/python/taichi/lang/kernel.py
index 3b9cefe565e3c8..8c195db1ba5878 100644
--- a/python/taichi/lang/kernel.py
+++ b/python/taichi/lang/kernel.py
@@ -50,7 +50,7 @@ def do_compile(self):
     func_body = tree.body[0]
     func_body.decorator_list = []
 
-    if get_runtime().print_preprocessed or 1:
+    if get_runtime().print_preprocessed:
       import astor
       print('Before preprocessing:')
       print(astor.to_source(tree.body[0], indent_with='  '))
@@ -59,7 +59,7 @@ def do_compile(self):
     visitor.visit(tree)
     ast.fix_missing_locations(tree)
 
-    if get_runtime().print_preprocessed or 1:
+    if get_runtime().print_preprocessed:
       import astor
       print('After preprocessing:')
       print(astor.to_source(tree.body[0], indent_with='  '))
@@ -213,7 +213,7 @@ def materialize(self, key=None, args=None, arg_features=None):
 
     src = remove_indent(inspect.getsource(self.func))
     tree = ast.parse(src)
-    if self.runtime.print_preprocessed or 1:
+    if self.runtime.print_preprocessed:
       import astor
       print('Before preprocessing:')
       print(astor.to_source(tree.body[0]))
@@ -239,7 +239,7 @@ def materialize(self, key=None, args=None, arg_features=None):
     visitor.visit(tree)
     ast.fix_missing_locations(tree)
     
-    if self.runtime.print_preprocessed or 1:
+    if self.runtime.print_preprocessed:
       import astor
       print('After preprocessing:')
       print(astor.to_source(tree.body[0], indent_with='  '))