1 files changed, 1 insertions, 1 deletions
diff --git a/lex.c b/lex.c
index 79d9448dae..a15309d502 100644
--- a/lex.c
+++ b/lex.c
@@ -1,6 +1,6 @@
 /* C code produced by gperf version 2.7.2 */
 /* Command-line: gperf -p -j1 -i 1 -g -o -t -N rb_reserved_word -k'1,3,$' ./keywords  */
-struct kwtable {char *name; int id[2]; enum lex_state state;};
+struct kwtable {const char *name; int id[2]; enum lex_state state;};
 
 #define TOTAL_KEYWORDS 40
 #define MIN_WORD_LENGTH 2