diff --git a/include/boost/unordered_map.hpp b/include/boost/unordered_map.hpp
index c172881f..bd6cfb2f 100644
--- a/include/boost/unordered_map.hpp
+++ b/include/boost/unordered_map.hpp
@@ -122,7 +122,7 @@ namespace boost
         }
 #else
         unordered_map(boost::unordered_detail::move_from<unordered_map<Key, T, Hash, Pred, Alloc> > other)
-            : base(other.base, boost::unordered_detail::move_tag())
+            : base(other.source.base, boost::unordered_detail::move_tag())
         {
         }
 
@@ -507,7 +507,7 @@ namespace boost
         }
 #else
         unordered_multimap(boost::unordered_detail::move_from<unordered_multimap<Key, T, Hash, Pred, Alloc> > other)
-            : base(other.base, boost::unordered_detail::move_tag())
+            : base(other.source.base, boost::unordered_detail::move_tag())
         {
         }
 
diff --git a/include/boost/unordered_set.hpp b/include/boost/unordered_set.hpp
index 5acdf55b..61922f85 100644
--- a/include/boost/unordered_set.hpp
+++ b/include/boost/unordered_set.hpp
@@ -119,7 +119,7 @@ namespace boost
         }
 #else
         unordered_set(boost::unordered_detail::move_from<unordered_set<Value, Hash, Pred, Alloc> > other)
-            : base(other.base, boost::unordered_detail::move_tag())
+            : base(other.source.base, boost::unordered_detail::move_tag())
         {
         }
 
@@ -476,7 +476,7 @@ namespace boost
         }
 #else
         unordered_multiset(boost::unordered_detail::move_from<unordered_multiset<Value, Hash, Pred, Alloc> > other)
-            : base(other.base, boost::unordered_detail::move_tag())
+            : base(other.source.base, boost::unordered_detail::move_tag())
         {
         }
 
diff --git a/test/unordered/compile_map.cpp b/test/unordered/compile_map.cpp
index 9e12d4c4..0e870fc6 100644
--- a/test/unordered/compile_map.cpp
+++ b/test/unordered/compile_map.cpp
@@ -13,6 +13,21 @@
 #include "../objects/minimal.hpp"
 #include "./compile_tests.hpp"
 
+// Explicit instantiation to catch compile-time errors
+
+template class boost::unordered_map<
+    test::minimal::assignable,
+    test::minimal::default_copy_constructible,
+    test::minimal::hash<test::minimal::assignable>,
+    test::minimal::equal_to<test::minimal::assignable>,
+    test::minimal::allocator<test::minimal::assignable> >;
+template class boost::unordered_multimap<
+    test::minimal::assignable,
+    test::minimal::copy_constructible,
+    test::minimal::hash<test::minimal::assignable>,
+    test::minimal::equal_to<test::minimal::assignable>,
+    test::minimal::allocator<test::minimal::assignable> >;
+
 UNORDERED_AUTO_TEST(test0)
 {
     typedef std::pair<test::minimal::assignable const,
diff --git a/test/unordered/compile_set.cpp b/test/unordered/compile_set.cpp
index 72fce46a..b1bc107c 100644
--- a/test/unordered/compile_set.cpp
+++ b/test/unordered/compile_set.cpp
@@ -13,6 +13,19 @@
 #include "../objects/minimal.hpp"
 #include "./compile_tests.hpp"
 
+// Explicit instantiation to catch compile-time errors
+
+template class boost::unordered_set<
+    test::minimal::assignable,
+    test::minimal::hash<test::minimal::assignable>,
+    test::minimal::equal_to<test::minimal::assignable>,
+    test::minimal::allocator<test::minimal::assignable> >;
+template class boost::unordered_multiset<
+    test::minimal::assignable,
+    test::minimal::hash<test::minimal::assignable>,
+    test::minimal::equal_to<test::minimal::assignable>,
+    test::minimal::allocator<test::minimal::assignable> >;
+
 UNORDERED_AUTO_TEST(test0)
 {
     test::minimal::assignable assignable = test::minimal::assignable::create();