diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5461363a4312..5d7596e6cbb1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-11-15  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* config/s390/s390.c (optimization_options): Set 
+	flag_asynchronous_unwind_tables to 1 by default.
+
 2002-11-15  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* config/s390/s390.h (ASM_PREFERRED_EH_DATA_FORMAT): Define.
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index 67f59d53b5ac..c2828a57aa7c 100644
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -816,6 +816,10 @@ optimization_options (level, size)
 {
   /* ??? There are apparently still problems with -fcaller-saves.  */
   flag_caller_saves = 0;
+
+  /* By default, always emit DWARF-2 unwind info.  This allows debugging
+     without maintaining a stack frame back-chain.  */
+  flag_asynchronous_unwind_tables = 1;
 }
 
 void