diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 879423d77..dc820c8a4 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+Thu Feb 15 01:39:51 2001  Christopher Faylor <cgf@cygnus.com>
+
+	* libc/include/sys/signal.h: Always include sys/types.h under Cygwin.
+
 2001-02-14  Kazuhiro Fujieda  <fujieda@jaist.ac.jp>
 
         * libc/include/stdlib.h: Add declarations of rand48 functions and
diff --git a/newlib/libc/include/sys/signal.h b/newlib/libc/include/sys/signal.h
index e590ae38c..53987afc3 100644
--- a/newlib/libc/include/sys/signal.h
+++ b/newlib/libc/include/sys/signal.h
@@ -12,7 +12,7 @@ extern "C" {
 
 /* #ifndef __STRICT_ANSI__*/
 
-#if defined(_POSIX_THREADS)
+#if defined(_POSIX_THREADS) || defined(__CYGWIN__)
 #include <sys/types.h>   /* for pthread data types */
 #endif