diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 6f690a608..5e31ee5af 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+Wed Dec 14  Jeff Johnston  <jjohnstn@redhat.com>
+
+	* configure.host: Turn on long double I/O for Cygwin.
+
 Wed Dec 14  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* MAINTAINERS: Removed Ranjith.
diff --git a/newlib/configure.host b/newlib/configure.host
index bb780afc0..961ef73ac 100644
--- a/newlib/configure.host
+++ b/newlib/configure.host
@@ -326,7 +326,7 @@ esac
 
 case "${host}" in
   *-*-cygwin*)
-	newlib_cflags="${newlib_cflags} -DHAVE_OPENDIR -DHAVE_RENAME -DSIGNAL_PROVIDED -DWANT_PRINTF_LONG_LONG -D_COMPILING_NEWLIB"
+	newlib_cflags="${newlib_cflags} -DHAVE_OPENDIR -DHAVE_RENAME -DSIGNAL_PROVIDED -DWANT_IO_LONG_DBL -DWANT_PRINTF_LONG_LONG -D_COMPILING_NEWLIB"
 	syscall_dir=syscalls
 	;;
 # RTEMS supplies its own versions of some routines: