diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a36232fbcbd..7b96f32b9ad 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2007-10-09  Wolfgang Bangerth  <bangerth@dealii.org>
+
+	PR libstdc++/33485 continued.
+	* include/parallel/multiway_mergesort.h: Use __builtin_alloca.
+	
 2007-10-09  Zhou Drangon  <drangon.mail@gmail.com>
 
 	PR libstdc++/33682
diff --git a/libstdc++-v3/include/parallel/multiway_mergesort.h b/libstdc++-v3/include/parallel/multiway_mergesort.h
index 9cc04052f5e..c1a07dc0352 100644
--- a/libstdc++-v3/include/parallel/multiway_mergesort.h
+++ b/libstdc++-v3/include/parallel/multiway_mergesort.h
@@ -139,7 +139,8 @@ namespace __gnu_parallel
 
     num_samples = Settings::sort_mwms_oversampling * d->num_threads - 1;
 
-    difference_type es[num_samples + 2];
+    difference_type* es = static_cast<difference_type*>(__builtin_alloca(sizeof(difference_type) * (num_samples + 2)));
+
     equally_split(sd->starts[d->iam + 1] - sd->starts[d->iam], num_samples + 1, es);
 
     for (difference_type i = 0; i < num_samples; i++)