diff --git a/user/tb/interp.c b/user/tb/interp.c
index bf7b8a3..4e28be1 100644
--- a/user/tb/interp.c
+++ b/user/tb/interp.c
@@ -58,7 +58,7 @@ void tz_tokenize(Tokenizer *tz) {
 void tz_classify(Tokenizer *tz) {
   Token *tk, *tktmp;
   LL_FOREACH_SAFE(tz->tokens, tk, tktmp) {
-    if (tk->str[0] == '"') {
+    if (tk->str[0] == '\'') {
       tk->type = TOK_STRING;
     } else if (tk->str[0] == '%') {
       RtCmd *cmd, *cmdtmp;