diff --git a/src/Parser/Lexer.cpp b/src/Parser/Lexer.cpp
index 085aa8d..09b5860 100644
--- a/src/Parser/Lexer.cpp
+++ b/src/Parser/Lexer.cpp
@@ -144,20 +144,21 @@ unsigned constexpr const_hash(char const *input) {
 }
 
 IToken* Lexer::LexIdentifierOrKeyword(char c){
-    vector<char> charVec(1, c);
     auto start = this -> Position - 1;
+    auto end = start;
     while (true){
         char next = this -> Peek();
         if (next == '\0') break;
         if (isalpha(next) || next == '_'){
             this -> Next();
-            charVec.push_back(next);
+            end++;
         }
         else{
             break;
         }
     }
-    string s = string(charVec.begin(), charVec.end());
+
+    string s = this -> ScriptString.substr(start, end - start + 1);
     switch (const_hash(s.c_str())){
         case const_hash("and"): return new SimpleToken(TokenKind::AndKeyword, start, 3);
         case const_hash("break"): return new SimpleToken(TokenKind::BreakKeyword, start, 5);