diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index fdc3375003c55a1965d0e7915e3dc0567bc8209b..b6c70a4895468046a1f807a088354cccadfab2f5 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2006-01-18  Paolo Carlini  <pcarlini@suse.de>
+
+	* include/bits/allocator.h: Include <bits/cpp_type_traits.h>.
+
 2006-01-18  Perry Smith  <pedz@easesoftware.net>
 
 	PR libstdc++/25823
diff --git a/libstdc++-v3/include/bits/allocator.h b/libstdc++-v3/include/bits/allocator.h
index 3e8d94a26e1cbc266933d5f654011eb322e30ac0..43939c14fa763e2adf7df131312c1d3a94d1c5c7 100644
--- a/libstdc++-v3/include/bits/allocator.h
+++ b/libstdc++-v3/include/bits/allocator.h
@@ -52,6 +52,8 @@
 // Define the base class to std::allocator.
 #include <bits/c++allocator.h>
 
+#include <bits/cpp_type_traits.h> // for __is_empty
+
 _GLIBCXX_BEGIN_NAMESPACE(std)
 
   template<typename _Tp>