diff --git a/src/basic/base-type/char-bool.md b/src/basic/base-type/char-bool.md
index 0f57e0ba..c88b4e1e 100644
--- a/src/basic/base-type/char-bool.md
+++ b/src/basic/base-type/char-bool.md
@@ -8,7 +8,7 @@
 
 下面的代码展示了几个颇具异域风情的字符：
 
-```
+```rust
 fn main() {
     let c = 'z';
     let z = 'ℤ';