diff --git a/include/boost/unordered_map.hpp b/include/boost/unordered_map.hpp
index 22119804..c172881f 100644
--- a/include/boost/unordered_map.hpp
+++ b/include/boost/unordered_map.hpp
@@ -126,11 +126,13 @@ namespace boost
         {
         }
 
+#if !BOOST_WORKAROUND(__BORLANDC__, < 0x0593)
         unordered_map& operator=(unordered_map x)
         {
             base.move(x.base);
             return *this;
         }
+#endif
 #endif
 
     private:
@@ -509,12 +511,14 @@ namespace boost
         {
         }
 
+#if !BOOST_WORKAROUND(__BORLANDC__, < 0x0593)
         unordered_multimap& operator=(unordered_multimap x)
         {
             base.move(x.base);
             return *this;
         }
 #endif
+#endif
 
 
     private:
diff --git a/include/boost/unordered_set.hpp b/include/boost/unordered_set.hpp
index b3c645ff..5acdf55b 100644
--- a/include/boost/unordered_set.hpp
+++ b/include/boost/unordered_set.hpp
@@ -123,11 +123,13 @@ namespace boost
         {
         }
 
+#if !BOOST_WORKAROUND(__BORLANDC__, < 0x0593)
         unordered_set& operator=(unordered_set x)
         {
             base.move(x.base);
             return *this;
         }
+#endif
 #endif
 
     private:
@@ -478,11 +480,13 @@ namespace boost
         {
         }
 
+#if !BOOST_WORKAROUND(__BORLANDC__, < 0x0593)
         unordered_multiset& operator=(unordered_multiset x)
         {
             base.move(x.base);
             return *this;
         }
+#endif
 #endif
 
     private: