diff --git a/parser/lexrules.py b/parser/lexrules.py
index d9a8096..686c9cc 100644
--- a/parser/lexrules.py
+++ b/parser/lexrules.py
@@ -14,7 +14,6 @@ tokens = [
 t_LPAREN = r'\('
 t_RPAREN = r'\)'
 t_SEMICOLON = r';'
-t_STRING = r'"([^"])*"'
 
 t_ignore = ' \t\r'
 
@@ -23,6 +22,11 @@ def t_ID(t):
     t.type = reserved.get(t.value, 'ID')
     return t
 
+def t_STRING(t):
+    r'"([^"])*"'
+    t.value = t.value[1:-1]
+    return t
+
 def t_newline(t):
     r'\n+'
     t.lexer.lineno += len(t.value)