diff --git a/docs/syntax.rst b/docs/syntax.rst
index 7261773a8bcb0..584722e442a50 100644
--- a/docs/syntax.rst
+++ b/docs/syntax.rst
@@ -1,5 +1,3 @@
-.. _syntax:
-
 Syntax
 ======
 
diff --git a/taichi/backends/cc/runtime/base.h b/taichi/backends/cc/runtime/base.h
index 609cc66740933..9d16776eb3d93 100644
--- a/taichi/backends/cc/runtime/base.h
+++ b/taichi/backends/cc/runtime/base.h
@@ -83,7 +83,6 @@ static inline Ti_f32 Ti_rand_f32(void) {
   return (Ti_f32) drand48();  // [0.0, 1.0)
 }
 
-) "\n" STR(
 )
 
 #define _CC_INSIDE_KERNEL
diff --git a/taichi/transforms/reverse_segments.cpp b/taichi/transforms/reverse_segments.cpp
index e6868d2cb47aa..59212f142a112 100644
--- a/taichi/transforms/reverse_segments.cpp
+++ b/taichi/transforms/reverse_segments.cpp
@@ -68,7 +68,7 @@ void reverse_segments(IRNode *root) {
         "Invalid program input for autodiff. Please check the documentation "
         "for the \"Kernel Simplicity Rule\":\n"
         "https://taichi.readthedocs.io/en/stable/"
-        "differentiable_programming.html#simplicity_rule");
+        "autodiff.html#simplicity_rule");
   for (auto &sblock : statement_blocks) {
     for (auto &&s : sblock) {
       block->statements.push_back(std::move(s));