1 files changed, 3 insertions, 3 deletions
diff --git a/st.h b/st.h
index fffbb32376..c5cc4e625e 100644
--- a/st.h
+++ b/st.h
@@ -55,12 +55,12 @@ st_table *st_init_strend_table_with_size _((int));
 int st_delete _((st_table *, st_data_t *, st_data_t *));
 int st_delete_safe _((st_table *, st_data_t *, st_data_t *, st_data_t));
 int st_insert _((st_table *, st_data_t, st_data_t));
-int st_insert_strend _((st_table *, unsigned char*, unsigned char*, st_data_t));
+int st_insert_strend _((st_table *, const unsigned char*, const unsigned char*, st_data_t));
 int st_lookup _((st_table *, st_data_t, st_data_t *));
-int st_lookup_strend _((st_table *, unsigned char*, unsigned char*, st_data_t*));
+int st_lookup_strend _((st_table *, const unsigned char*, const unsigned char*, st_data_t*));
 void st_foreach _((st_table *, int (*)(ANYARGS), st_data_t));
 void st_add_direct _((st_table *, st_data_t, st_data_t));
-void st_add_direct_strend _((st_table *, unsigned char*, unsigned char*, st_data_t));
+void st_add_direct_strend _((st_table *, const unsigned char*, const unsigned char*, st_data_t));
 void st_free_table _((st_table *));
 void st_cleanup_safe _((st_table *, st_data_t));
 st_table *st_copy _((st_table *));