diff --git a/include/pocketpy/lexer.h b/include/pocketpy/lexer.h
index b00bec99..35a3ce20 100644
--- a/include/pocketpy/lexer.h
+++ b/include/pocketpy/lexer.h
@@ -21,7 +21,7 @@ constexpr const char* kTokens[] = {
     "<<", "<<=", ">>", ">>=",
     /*****************************************/
     ".", ",", ":", ";", "#", "(", ")", "[", "]", "{", "}",
-    "**", "=", ">", "<", "..", "...", "->", "?", "@", "==", "!=", ">=", "<=",
+    "**", "=", ">", "<", "..", "...", "->", "@", "==", "!=", ">=", "<=",
     "++", "--", "~",
     /** KW_BEGIN **/
     "class", "import", "as", "def", "lambda", "pass", "del", "from", "with", "yield",
diff --git a/src/lexer.cpp b/src/lexer.cpp
index 4eb6a495..978a5c20 100644
--- a/src/lexer.cpp
+++ b/src/lexer.cpp
@@ -344,7 +344,6 @@ static bool is_unicode_Lo_char(uint32_t c) {
                 case '&': add_token_2('=', TK("&"), TK("&=")); return true;
                 case '|': add_token_2('=', TK("|"), TK("|=")); return true;
                 case '^': add_token_2('=', TK("^"), TK("^=")); return true;
-                case '?': add_token(TK("?")); return true;
                 case '.': {
                     if(matchchar('.')) {
                         if(matchchar('.')) {