--- a/gettext-tools/gnulib-lib/sys_select.in.h
+++ b/gettext-tools/gnulib-lib/sys_select.in.h
@@ -82,8 +82,8 @@
    Also, Mac OS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
    in <sys/time.h>.
    But avoid namespace pollution on glibc systems and "unknown type
-   name" problems on Cygwin.  */
-# if !(defined __GLIBC__ || defined __CYGWIN__)
+   name" problems on newlib systems.  */
+# if !(defined __GLIBC__ || defined __NEWLIB__)
 #  include <sys/time.h>
 # endif
 
@@ -102,10 +102,10 @@
 
 /* Get definition of 'sigset_t'.
    But avoid namespace pollution on glibc systems and "unknown type
-   name" problems on Cygwin.
+   name" problems on newlib systems..
    Do this after the include_next (for the sake of OpenBSD 5.0) but before
    the split double-inclusion guard (for the sake of Solaris).  */
-#if !((defined __GLIBC__ || defined __CYGWIN__) && !defined __UCLIBC__)
+#if !((defined __GLIBC__ || defined __NEWLIB__) && !defined __UCLIBC__)
 # include <signal.h>
 #endif