1 files changed, 1 insertions, 1 deletions
diff --git a/token.h b/token.h
index ecb8ea01..d4defd7e 100644
--- a/token.h
+++ b/token.h
@@ -150,7 +150,7 @@ struct token {
 	struct position pos;
 	struct token *next;
 	union {
-		char *number;
+		const char *number;
 		struct ident *ident;
 		unsigned int special;
 		struct string *string;