diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 2e5663d4ce0..54e31c2a15c 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2010-11-27  François Dumont  <francois.cppdevs@free.fr>
+
+	* include/debug/unordered_map (unordered_multimap<>::erase): Fix to
+	erase all elements associated to the key.
+	* include/debug/unordered_set (unordered_multiset<>::erase): Likewise.
+	* testsuite/23_containers/unordered_multimap/erase/1.cc: Modify to
+	check for multiple erase.
+	* testsuite/23_containers/unordered_multiset/erase/1.cc: Likewise.
+
 2010-11-27  François Dumont  <francois.cppdevs@free.fr>
 
 	* include/debug/unordered_map, unordered_set (unordered_map<>::insert,
diff --git a/libstdc++-v3/include/debug/unordered_map b/libstdc++-v3/include/debug/unordered_map
index d7b139388b0..5ea35acfac1 100644
--- a/libstdc++-v3/include/debug/unordered_map
+++ b/libstdc++-v3/include/debug/unordered_map
@@ -538,12 +538,13 @@ namespace __debug
       erase(const key_type& __key)
       {
 	size_type __ret(0);
-	_Base_iterator __victim(_Base::find(__key));
-	if (__victim != _Base::end())
+	std::pair<_Base_iterator, _Base_iterator> __pair =
+	  _Base::equal_range(__key);
+	for (_Base_iterator __victim = __pair.first; __victim != __pair.second;)
 	  {
 	    this->_M_invalidate_if(_Equal(__victim));
-	    _Base::erase(__victim);
-	    __ret = 1;
+	    _Base::erase(__victim++);
+	    ++__ret;
 	  }
 	return __ret;
       }
diff --git a/libstdc++-v3/include/debug/unordered_set b/libstdc++-v3/include/debug/unordered_set
index e39cfa8f9a1..3e771a86daf 100644
--- a/libstdc++-v3/include/debug/unordered_set
+++ b/libstdc++-v3/include/debug/unordered_set
@@ -519,12 +519,13 @@ namespace __debug
       erase(const key_type& __key)
       {
 	size_type __ret(0);
-	_Base_iterator __victim(_Base::find(__key));
-	if (__victim != _Base::end())
+	std::pair<_Base_iterator, _Base_iterator> __pair =
+	  _Base::equal_range(__key);
+	for (_Base_iterator __victim = __pair.first; __victim != __pair.second;)
 	  {
 	    this->_M_invalidate_if(_Equal(__victim));
-	    _Base::erase(__victim);
-	    __ret = 1;
+	    _Base::erase(__victim++);
+	    ++__ret;
 	  }
 	return __ret;
       }
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_multimap/erase/1.cc b/libstdc++-v3/testsuite/23_containers/unordered_multimap/erase/1.cc
index 0aa1a071871..09515726598 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_multimap/erase/1.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_multimap/erase/1.cc
@@ -44,15 +44,16 @@ void test01()
   mm1.insert(value_type("umbra/penumbra", 8));
   mm1.insert(value_type("belonging (no longer mix)", 9));
   mm1.insert(value_type("one line behind", 10));
-  VERIFY( mm1.size() == 10 );
+  mm1.insert(value_type("because to why", 11));
+  VERIFY( mm1.size() == 11 );
 
   VERIFY( mm1.erase("eeilo") == 1 );
-  VERIFY( mm1.size() == 9 );
+  VERIFY( mm1.size() == 10 );
   iterator it1 = mm1.find("eeilo");
   VERIFY( it1 == mm1.end() );
 
   VERIFY( mm1.erase("tillsammans") == 1 );
-  VERIFY( mm1.size() == 8 );
+  VERIFY( mm1.size() == 9 );
   iterator it2 = mm1.find("tillsammans");
   VERIFY( it2 == mm1.end() );
 
@@ -60,17 +61,17 @@ void test01()
   iterator it3 = mm1.find("belonging (no longer mix)");
   VERIFY( it3 != mm1.end() );
   VERIFY( mm1.erase(it3->first) == 1 );
-  VERIFY( mm1.size() == 7 );
+  VERIFY( mm1.size() == 8 );
   it3 = mm1.find("belonging (no longer mix)");
   VERIFY( it3 == mm1.end() );
 
   VERIFY( !mm1.erase("abra") );
-  VERIFY( mm1.size() == 7 );
+  VERIFY( mm1.size() == 8 );
 
   VERIFY( !mm1.erase("eeilo") );
-  VERIFY( mm1.size() == 7 );
+  VERIFY( mm1.size() == 8 );
 
-  VERIFY( mm1.erase("because to why") == 1 );
+  VERIFY( mm1.erase("because to why") == 2 );
   VERIFY( mm1.size() == 6 );
   iterator it4 = mm1.find("because to why");
   VERIFY( it4 == mm1.end() );
diff --git a/libstdc++-v3/testsuite/23_containers/unordered_multiset/erase/1.cc b/libstdc++-v3/testsuite/23_containers/unordered_multiset/erase/1.cc
index 9951838e9de..327dc4bd0b2 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_multiset/erase/1.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_multiset/erase/1.cc
@@ -43,15 +43,16 @@ void test01()
   ms1.insert("umbra/penumbra");
   ms1.insert("belonging (no longer mix)");
   ms1.insert("one line behind");
-  VERIFY( ms1.size() == 10 );
+  ms1.insert("because to why");
+  VERIFY( ms1.size() == 11 );
 
   VERIFY( ms1.erase("eeilo") == 1 );
-  VERIFY( ms1.size() == 9 );
+  VERIFY( ms1.size() == 10 );
   iterator it1 = ms1.find("eeilo");
   VERIFY( it1 == ms1.end() );
 
   VERIFY( ms1.erase("tillsammans") == 1 );
-  VERIFY( ms1.size() == 8 );
+  VERIFY( ms1.size() == 9 );
   iterator it2 = ms1.find("tillsammans");
   VERIFY( it2 == ms1.end() );
 
@@ -59,17 +60,17 @@ void test01()
   iterator it3 = ms1.find("belonging (no longer mix)");
   VERIFY( it3 != ms1.end() );
   VERIFY( ms1.erase(*it3) == 1 );
-  VERIFY( ms1.size() == 7 );
+  VERIFY( ms1.size() == 8 );
   it3 = ms1.find("belonging (no longer mix)");
   VERIFY( it3 == ms1.end() );
 
   VERIFY( !ms1.erase("abra") );
-  VERIFY( ms1.size() == 7 );
+  VERIFY( ms1.size() == 8 );
 
   VERIFY( !ms1.erase("eeilo") );
-  VERIFY( ms1.size() == 7 );
+  VERIFY( ms1.size() == 8 );
 
-  VERIFY( ms1.erase("because to why") == 1 );
+  VERIFY( ms1.erase("because to why") == 2 );
   VERIFY( ms1.size() == 6 );
   iterator it4 = ms1.find("because to why");
   VERIFY( it4 == ms1.end() );