diff --git a/ChangeLog b/ChangeLog
index 8a1747c16..fdabf1ca9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-01-28  Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/NSException.m: Fix problem preventing stack traccces from
+	being generated.
+
 2009-01-27  Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Source/NSValue.m: ([valueWithNonretainedObject:]) zero the reference
diff --git a/Source/NSException.m b/Source/NSException.m
index 82564b73b..6dc60e771 100644
--- a/Source/NSException.m
+++ b/Source/NSException.m
@@ -834,7 +834,7 @@ callUncaughtHandler(id value)
     }
 
   if (_e_stack == nil
-    && GSPrivateEnvironmentFlag("GNUSTEP_STACK_TRACE", YES) == NO)
+    && GSPrivateEnvironmentFlag("GNUSTEP_STACK_TRACE", YES) == YES)
     {
       ASSIGN(_e_stack, GSPrivateStackAddresses());
     }