diff --git a/cclox_src/scanner.hh b/cclox_src/scanner.hh
index 639c563..fb9b0e2 100644
--- a/cclox_src/scanner.hh
+++ b/cclox_src/scanner.hh
@@ -14,7 +14,7 @@ struct Scanner {
   char peek();
   void add_token(TokenType type);
   void add_token(TokenType type, Object literal);
-	void string();
+  void string();
 
   std::string code;
   std::vector<Token> tokens;