diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 1c78c2e17a0..2b1e5d9269f 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,9 @@
+2007-04-13  Paolo Carlini  <pcarlini@suse.de>
+
+	PR libstdc++/31554
+	* include/bits/stl_algo.h (stable_partition): Convert __buf.size()
+	to _DistanceType.
+
 2007-04-13  Paolo Carlini  <pcarlini@suse.de>
 
 	* include/ext/numeric_traits.h: Do not include <limits>.
diff --git a/libstdc++-v3/include/bits/stl_algo.h b/libstdc++-v3/include/bits/stl_algo.h
index 0496ebf3884..30ffbf0dd15 100644
--- a/libstdc++-v3/include/bits/stl_algo.h
+++ b/libstdc++-v3/include/bits/stl_algo.h
@@ -2186,7 +2186,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
 	  return
 	    std::__stable_partition_adaptive(__first, __last, __pred,
 					  _DistanceType(__buf.requested_size()),
-					  __buf.begin(), __buf.size());
+					  __buf.begin(),
+					  _DistanceType(__buf.size()));
 	else
 	  return
 	    std::__inplace_stable_partition(__first, __last, __pred,