1 files changed, 1 insertions, 1 deletions
diff --git a/lex.c.src b/lex.c.src
index 76cd2437a9..504d5230bf 100644
--- a/lex.c.src
+++ b/lex.c.src
@@ -1,5 +1,5 @@
 %{
-struct kwtable {char *name; int id[2]; enum lex_state_e state;};
+struct kwtable {const char *name; int id[2]; enum lex_state_e state;};
 const struct kwtable *rb_reserved_word(const char *, unsigned int);
 #ifndef RIPPER
 %}