diff --git a/ChangeLog b/ChangeLog
index 5bfa533886f4ad..dceba29380eec9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Jan 18 20:47:35 2004  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* ruby.c: use translate_char() on Cygwin.
+
 Sun Jan 18 20:00:16 2004  NAKAMURA, Hiroshi  <nakahiro@sarion.co.jp>
 
 	* lib/soap/wsdlDriver.rb, lib/wsdl/soap/operation.rb: add support of
diff --git a/ruby.c b/ruby.c
index 2f0dceb697dd10..afe1e71ae803e6 100644
--- a/ruby.c
+++ b/ruby.c
@@ -212,7 +212,7 @@ ruby_incpush(path)
 #define LOAD_RELATIVE 1
 #endif
 
-#ifdef DOSISH
+#if defined DOSISH || defined __CYGWIN__
 static inline void translate_char _((char *, int, int));
 
 static inline void
@@ -260,7 +260,7 @@ ruby_init_loadpath()
 #endif
 
     libpath[FILENAME_MAX] = '\0';
-#ifdef DOSISH
+#if defined DOSISH || defined __CYGWIN__
     translate_char(libpath, '\\', '/');
 #endif
     p = strrchr(libpath, '/');
@@ -755,7 +755,7 @@ proc_options(argc, argv)
 		script = ruby_sourcefile = rb_source_filename(script);
 		script_node = NEW_NEWLINE(0);
 	    }
-#ifdef DOSISH
+#if defined DOSISH || defined __CYGWIN__
 	    translate_char(script, '\\', '/');
 #endif
 	    argc--; argv++;