1 files changed, 3 insertions, 3 deletions

diff --git a/src/sp_config_utils.c b/src/sp_config_utils.c
index e93ef31..84b1f30 100644
--- a/src/sp_config_utils.c
+++ b/src/sp_config_utils.c
@@ -1,8 +1,8 @@
 #include "php_snuffleupagus.h"
 
 
-sp_list_node *parse_functions_list(char *value) {
-  static const char *sep = ">";
+sp_list_node *parse_functions_list(const char *const value) {
+  static const char *const sep = ">";
 
   if (NULL == strchr(value, sep[0])) {
     return NULL;
@@ -10,7 +10,7 @@ sp_list_node *parse_functions_list(char *value) {
 
   sp_list_node *list = NULL;
   char *tmp = strdup(value);
-  char *function_name;
+  const char *function_name;
   char *next_token = tmp;
   while ((function_name = strtok_r(NULL, sep, &next_token))) {
     list = sp_list_prepend(list, strdup(function_name));