diff --git a/src/router.ts b/src/router.ts
index 425a682..a15fa9d 100644
--- a/src/router.ts
+++ b/src/router.ts
@@ -154,7 +154,7 @@ export class KoaRouter {
 
 		//严格模式
 		if (option?.strict) regexpStr += "$";
-		else regexpStr += "\b";
+		else regexpStr += "\\b";
 
 		//生成正则表达式
 		const regexp = new RegExp(regexpStr);