diff --git a/ChangeLog b/ChangeLog
index 71dfab63b1..4e583b4b86 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Feb 23 22:08:16 2005  Kazuo Saito  <ksaito@uranus.dti.ne.jp>
+
+	* st.c, st.h: imported additional file changes on
+	Oniguruma 3.7.0.
+
 Wed Feb 23 21:45:29 2005  Kazuo Saito  <ksaito@uranus.dti.ne.jp>
 
 	* ascii.c, euc_jp.c, oniggnu.h, oniguruma.h, regcomp.c,
diff --git a/st.c b/st.c
index 5bce4ff836..65c2cc58bd 100644
--- a/st.c
+++ b/st.c
@@ -300,8 +300,8 @@ st_lookup(table, key, value)
 int
 st_lookup_strend(table, str_key, end_key, value)
     st_table *table;
-    unsigned char* str_key;
-    unsigned char* end_key;
+    const unsigned char* str_key;
+    const unsigned char* end_key;
     st_data_t *value;
 {
   st_strend_key key;
@@ -355,8 +355,8 @@ st_insert(table, key, value)
 int
 st_insert_strend(table, str_key, end_key, value)
      st_table *table;
-     unsigned char* str_key;
-     unsigned char* end_key;
+     const unsigned char* str_key;
+     const unsigned char* end_key;
      st_data_t value;
 {
   st_strend_key* key;
@@ -384,8 +384,8 @@ st_add_direct(table, key, value)
 void
 st_add_direct_strend(table, str_key, end_key, value)
     st_table *table;
-    unsigned char* str_key;
-    unsigned char* end_key;
+    const unsigned char* str_key;
+    const unsigned char* end_key;
     st_data_t value;
 {
   st_strend_key* key;
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 *));