diff --git a/include/etl/algorithm.h b/include/etl/algorithm.h
index 31b0b0fc..6a2714ec 100644
--- a/include/etl/algorithm.h
+++ b/include/etl/algorithm.h
@@ -2048,6 +2048,7 @@ namespace etl
     return std::is_permutation(begin1, end1, begin2, predicate);
   }
 
+  #if ETL_CPP14_SUPPORTED
   //***************************************************************************
   /// is_permutation
   ///\ingroup algorithm
@@ -2078,6 +2079,7 @@ namespace etl
   {
     return std::is_permutation(begin1, end1, begin2, end2, predicate);
   }
+  #endif
 #endif
 
 #if defined(ETL_NO_STL) || !ETL_CPP11_SUPPORTED
diff --git a/include/etl/flat_multimap.h b/include/etl/flat_multimap.h
index e25588fd..f7955984 100644
--- a/include/etl/flat_multimap.h
+++ b/include/etl/flat_multimap.h
@@ -36,6 +36,7 @@ SOFTWARE.
 #include "platform.h"
 #include "reference_flat_multimap.h"
 #include "pool.h"
+#include "utility.h"
 
 #if ETL_CPP11_SUPPORTED && !defined(ETL_STLPORT) && !defined(ETL_NO_STL)
   #include <initializer_list>
diff --git a/include/etl/indirect_vector.h b/include/etl/indirect_vector.h
index 09511ddb..102583bf 100644
--- a/include/etl/indirect_vector.h
+++ b/include/etl/indirect_vector.h
@@ -35,7 +35,7 @@ SOFTWARE.
 #include "vector.h"
 #include "pool.h"
 #include "iterator.h"
-#include "iterator.h"
+#include "utility.h"
 #include "functional.h"
 
 #if ETL_CPP11_SUPPORTED && !defined(ETL_STLPORT) && !defined(ETL_NO_STL)
diff --git a/include/etl/memory.h b/include/etl/memory.h
index ad6b6aee..5b59ce90 100644
--- a/include/etl/memory.h
+++ b/include/etl/memory.h
@@ -34,8 +34,8 @@ SOFTWARE.
 #include "platform.h"
 #include "algorithm.h"
 #include "type_traits.h"
-
 #include "iterator.h"
+#include "utility.h"
 
 #include <assert.h>
 
diff --git a/include/etl/pool.h b/include/etl/pool.h
index 8f051420..9f8fba81 100644
--- a/include/etl/pool.h
+++ b/include/etl/pool.h
@@ -37,7 +37,7 @@ SOFTWARE.
 
 #include "algorithm.h"
 #include "iterator.h"
-
+#include "utility.h"
 #include "error_handler.h"
 #include "alignment.h"
 #include "array.h"
diff --git a/include/etl/priority_queue.h b/include/etl/priority_queue.h
index 8f1174ed..2803139e 100644
--- a/include/etl/priority_queue.h
+++ b/include/etl/priority_queue.h
@@ -36,8 +36,8 @@ SOFTWARE.
 #include "platform.h"
 
 #include "algorithm.h"
+#include "utility.h"
 #include "functional.h"
-
 #include "container.h"
 #include "vector.h"
 #include "type_traits.h"
diff --git a/include/etl/stack.h b/include/etl/stack.h
index b0e5d351..26a9c398 100644
--- a/include/etl/stack.h
+++ b/include/etl/stack.h
@@ -37,9 +37,8 @@ SOFTWARE.
 #include <new>
 
 #include "platform.h"
-
 #include "algorithm.h"
-
+#include "utility.h"
 #include "container.h"
 #include "alignment.h"
 #include "array.h"
diff --git a/include/etl/utility.h b/include/etl/utility.h
index a5f1af4e..3b79f30a 100644
--- a/include/etl/utility.h
+++ b/include/etl/utility.h
@@ -132,7 +132,7 @@ namespace etl
       swap(second, other.second);
     }
 
-    pair& operator =(const pair<T1, T2>& other)
+    pair<T1, T2>& operator =(const pair<T1, T2>& other)
     {
       first  = other.first;
       second = other.second;
@@ -141,7 +141,7 @@ namespace etl
     }
 
     template <typename U1, typename U2>
-    pair& operator =(const pair<U1, U2>& other)
+    pair<U1, U2>& operator =(const pair<U1, U2>& other)
     {
       first  = other.first;
       second = other.second;
@@ -150,7 +150,7 @@ namespace etl
     }
 
 #if ETL_CPP11_SUPPORTED
-    pair& operator =(pair<T1, T2>&& other)
+    pair<T1, T2>& operator =(pair<T1, T2>&& other)
     {
       first  = etl::move(other.first);
       second = etl::move(other.second);
@@ -159,7 +159,7 @@ namespace etl
     }
 
     template <typename U1, typename U2>
-    pair& operator =(pair<U1, U2>&& other)
+    pair<U1, U2>& operator =(pair<U1, U2>&& other)
     {
       first  = etl::move(other.first);
       second = etl::move(other.second);
diff --git a/include/etl/variant.h b/include/etl/variant.h
index 624c2310..6ceb9c46 100644
--- a/include/etl/variant.h
+++ b/include/etl/variant.h
@@ -36,6 +36,7 @@ SOFTWARE.
 #include <new>
 
 #include "platform.h"
+#include "utility.h"
 #include "array.h"
 #include "largest.h"
 #include "exception.h"
diff --git a/include/etl/version.h b/include/etl/version.h
index 1af2851f..94fa8d22 100644
--- a/include/etl/version.h
+++ b/include/etl/version.h
@@ -39,7 +39,7 @@ SOFTWARE.
 
 #define ETL_VERSION_MAJOR 16
 #define ETL_VERSION_MINOR  4
-#define ETL_VERSION_PATCH  1
+#define ETL_VERSION_PATCH  2
 #define ETL_VERSION       ETL_STRINGIFY(ETL_VERSION_MAJOR) "." ETL_STRINGIFY(ETL_VERSION_MINOR) "." ETL_STRINGIFY(ETL_VERSION_PATCH)
 #define ETL_VERSION_W     ETL_STRINGIFY(ETL_VERSION_MAJOR) L"." ETL_STRINGIFY(ETL_VERSION_MINOR) L"." ETL_STRINGIFY(ETL_VERSION_PATCH)
 #define ETL_VERSION_U16   ETL_STRINGIFY(ETL_VERSION_MAJOR) u"." ETL_STRINGIFY(ETL_VERSION_MINOR) u"." ETL_STRINGIFY(ETL_VERSION_PATCH)
diff --git a/library.json b/library.json
index c263db8b..99059fc2 100644
--- a/library.json
+++ b/library.json
@@ -1,6 +1,6 @@
 {
   "name": "Embedded Template Library",
-  "version": "16.4.1",
+  "version": "16.4.2",
   "authors": {
     "name": "John Wellbelove",
     "email": "john.wellbelove@etlcpp.com"
diff --git a/library.properties b/library.properties
index a773a8de..124bb891 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=Embedded Template Library
-version=16.4.1
+version=16.4.2
 author= John Wellbelove <john.wellbelove@etlcpp.com>
 maintainer=John Wellbelove <john.wellbelove@etlcpp.com>
 license=MIT
diff --git a/support/Release notes.txt b/support/Release notes.txt
index 4924c077..96083f41 100644
--- a/support/Release notes.txt	
+++ b/support/Release notes.txt	
@@ -1,3 +1,7 @@
+===============================================================================
+16.4.2
+Fix etl::pair error and warning.
+
 ===============================================================================
 16.4.1
 Moved icache.h to 'experimental' folder.
diff --git a/test/vs2017/DebugLLVMNoSTL/.gitignore b/test/vs2017/DebugLLVMNoSTL/.gitignore
new file mode 100644
index 00000000..b883f1fd
--- /dev/null
+++ b/test/vs2017/DebugLLVMNoSTL/.gitignore
@@ -0,0 +1 @@
+*.exe