diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index c0345ac4db66c84979d54e13f6d3178661d8653d..06e7b2c6974d5c054d51cf57980c15d3997837a0 100644
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,3 +1,8 @@
+2018-07-06  Sebastian Huber  <sebastian.huber@embedded-brains.de>
+
+	* libgnat/system-rtems.ads (Frontend_Exceptions): Set to False.
+	(ZCX_By_Default): Set to True.
+
 2018-07-02  Martin Liska  <mliska@suse.cz>
 
 	* gnatvsn.ads: Bump Library_Version to 9.
diff --git a/gcc/ada/libgnat/system-rtems.ads b/gcc/ada/libgnat/system-rtems.ads
index ce1ce2bda3a4acc52493c7fa7b9fcd83d2ef16c6..8e7b60ea6391af11687b2a391898c40dccd92518 100644
--- a/gcc/ada/libgnat/system-rtems.ads
+++ b/gcc/ada/libgnat/system-rtems.ads
@@ -160,7 +160,7 @@ private
    Always_Compatible_Rep     : constant Boolean := False;
    Suppress_Standard_Library : constant Boolean := False;
    Use_Ada_Main_Program_Name : constant Boolean := False;
-   Frontend_Exceptions       : constant Boolean := True;
-   ZCX_By_Default            : constant Boolean := False;
+   Frontend_Exceptions       : constant Boolean := False;
+   ZCX_By_Default            : constant Boolean := True;
 
 end System;