diff --git a/lib/krb5/store.c b/lib/krb5/store.c
index 8c955f8da..50be3b157 100644
--- a/lib/krb5/store.c
+++ b/lib/krb5/store.c
@@ -275,8 +275,7 @@ krb5_ret_string(krb5_storage *sp,
 }
 
 krb5_error_code
-krb5_store_stringz(krb5_storage *sp,
-		  char *s)
+krb5_store_stringz(krb5_storage *sp, const char *s)
 {
     size_t len = strlen(s) + 1;
     ssize_t ret;