diff --git a/include/ChangeLog b/include/ChangeLog
index bd5ff4ce1..b083e4b24 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,8 @@
+2001-12-19  Werner Koch  <wk@gnupg.org>
+
+	* util.h [CYGWIN32]: Allow this as an alias for MINGW32. Include
+	stdarg.h becuase we use the va_list type.  By Disastry.
+
 2001-09-28  Werner Koch  <wk@gnupg.org>
 
 	* cipher.h (PUBKEY_USAGE_CERT): New.
diff --git a/include/util.h b/include/util.h
index d8263dd0f..b690eca82 100644
--- a/include/util.h
+++ b/include/util.h
@@ -20,6 +20,10 @@
 #ifndef G10_UTIL_H
 #define G10_UTIL_H
 
+#if defined (__MINGW32__) || defined (__CYGWIN32__)
+# include <stdarg.>
+#endif
+
 #include "types.h"
 #include "errors.h"
 #include "types.h"
@@ -220,7 +224,7 @@ int strcasecmp( const char *, const char *b);
   #define stricmp(a,b)	 strcasecmp( (a), (b) )
 #endif
 
-#ifdef __MINGW32__
+#if defined (__MINGW32__) || defined (__CYGWIN32__)
 /*-- w32reg.c --*/
 char *read_w32_registry_string( const char *root,
 				const char *dir, const char *name );