diff --git a/ChangeLog b/ChangeLog
index 65d7e41d80..f97faeb536 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jul 17 12:30:05 2013  Tanaka Akira  <akr@fsij.org>
+
+	* include/ruby/st.h (st_strcasecmp): Macro defined for compatibility.
+	  (st_strncasecmp): Ditto.
+
 Wed Jul 17 11:57:45 2013  Takeyuki FUJIOKA  <xibbar@ruby-lang.org>
 
 	* lib/cgi/util.rb (CGI::Util#escape, unescape): Avoid use of regexp
diff --git a/include/ruby/st.h b/include/ruby/st.h
index d5ef4bd0ab..e71301b519 100644
--- a/include/ruby/st.h
+++ b/include/ruby/st.h
@@ -121,6 +121,8 @@ int st_numcmp(st_data_t, st_data_t);
 st_index_t st_numhash(st_data_t);
 int st_locale_insensitive_strcasecmp(const char *s1, const char *s2);
 int st_locale_insensitive_strncasecmp(const char *s1, const char *s2, size_t n);
+#define st_strcasecmp st_locale_insensitive_strcasecmp
+#define st_strncasecmp st_locale_insensitive_strncasecmp
 size_t st_memsize(const st_table *);
 st_index_t st_hash(const void *ptr, size_t len, st_index_t h);
 st_index_t st_hash_uint32(st_index_t h, uint32_t i);