diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 60af325a121..59624138ed4 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,11 @@
+2005-09-25  Benjamin Kosnik  <bkoz@redhat.com>
+	    Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	* include/ext/mt_allocator.h
+	(__per_type_pool<...true>::_S_initialize_once): Always call
+	_M_initialize_once.
+	(__common_pool<...true>::_S_initialize_once): Same.
+
 2005-09-23  Benjamin Kosnik  <bkoz@redhat.com>
 
 	* testsuite/ext/mt_allocator/tune-1.cc: Clarify for single-thread.
diff --git a/libstdc++-v3/include/ext/mt_allocator.h b/libstdc++-v3/include/ext/mt_allocator.h
index 23dd511374c..014e62a57c1 100644
--- a/libstdc++-v3/include/ext/mt_allocator.h
+++ b/libstdc++-v3/include/ext/mt_allocator.h
@@ -432,8 +432,11 @@ namespace __gnu_cxx
 		static __gthread_once_t __once = __GTHREAD_ONCE_INIT;
 		__gthread_once(&__once, _S_initialize);
 	      }
-	    else
-	      _S_get_pool()._M_initialize_once(); 
+
+	    // Double check initialization. May be necessary on some
+	    // systems for proper construction when not compiling with
+	    // thread flags.
+	    _S_get_pool()._M_initialize_once(); 
 	    __init = true;
 	  }
       }
@@ -524,8 +527,11 @@ namespace __gnu_cxx
 		static __gthread_once_t __once = __GTHREAD_ONCE_INIT;
 		__gthread_once(&__once, _S_initialize);
 	      }
-	    else
-	      _S_get_pool()._M_initialize_once(); 
+
+	    // Double check initialization. May be necessary on some
+	    // systems for proper construction when not compiling with
+	    // thread flags.
+	    _S_get_pool()._M_initialize_once(); 
 	    __init = true;
 	  }
       }