diff --git a/src/parser/parser.l b/src/parser/parser.l
index 6be0f13..b046d60 100644
--- a/src/parser/parser.l
+++ b/src/parser/parser.l
@@ -110,11 +110,13 @@ sizeof              return TOK_SIZEOF;
 
 L?'[^\\]'           return TOK_CHAR_CONST;
 L?'\\.'             return TOK_CHAR_CONST;
-L?'\\n'             (void)'\n'; return TOK_CHAR_CONST;
-L?'\\t'             (void)'\t'; return TOK_CHAR_CONST;
-L?'\\r'             (void)'\r'; return TOK_CHAR_CONST;
+L?'\\a'             (void)'\a'; return TOK_CHAR_CONST;
 L?'\\b'             (void)'\b'; return TOK_CHAR_CONST;
 L?'\\f'             (void)'\f'; return TOK_CHAR_CONST;
+L?'\\n'             (void)'\n'; return TOK_CHAR_CONST;
+L?'\\r'             (void)'\r'; return TOK_CHAR_CONST;
+L?'\\t'             (void)'\t'; return TOK_CHAR_CONST;
+L?'\\v'             (void)'\v'; return TOK_CHAR_CONST;
 [0-9]+([uU][lL]?[lL]?)?              return TOK_INT_CONST;
 0[xX][0-9a-fA-F]+([uU][lL]?[lL]?)?   return TOK_INT_CONST;
 ([0-9]+\.[0-9]*|\.[0-9]+)([eE][-+]?[0-9]+)?[fFlL]?     return TOK_FLOAT_CONST;
@@ -139,11 +141,13 @@ L?'\\f'             (void)'\f'; return TOK_CHAR_CONST;
                     char v[2] = {(char)val, '\0'};
                     String_concat(build_string, v);
 }
-\\n                 String_concat(build_string, "\n");
-\\t                 String_concat(build_string, "\t");
-\\r                 String_concat(build_string, "\r");
+\\a                 String_concat(build_string, "\a");
 \\b                 String_concat(build_string, "\b");
 \\f                 String_concat(build_string, "\f");
+\\n                 String_concat(build_string, "\n");
+\\r                 String_concat(build_string, "\r");
+\\t                 String_concat(build_string, "\t");
+\\v                 String_concat(build_string, "\v");
 \\.                 String_concat(build_string, &yytext[1]);
 [^\\\"]+            String_concat(build_string, yytext);
 }