diff --git a/include/etl/mutex.h b/include/etl/mutex.h
index 33abe27b..d8c74b86 100644
--- a/include/etl/mutex.h
+++ b/include/etl/mutex.h
@@ -43,6 +43,9 @@ SOFTWARE.
 #elif defined(ETL_COMPILER_GCC)
   #include "mutex/mutex_gcc_sync.h"
   #define ETL_HAS_MUTEX 1
+#elif defined(ETL_COMPILER_GCC)
+  #include "mutex/mutex_clang_sync.h"
+  #define ETL_HAS_MUTEX 1
 #else
   #define ETL_HAS_MUTEX 0
 #endif
diff --git a/include/etl/mutex/mutex_clang_sync.h b/include/etl/mutex/mutex_clang_sync.h
new file mode 100644
index 00000000..29434219
--- /dev/null
+++ b/include/etl/mutex/mutex_clang_sync.h
@@ -0,0 +1,34 @@
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+https://www.etlcpp.com
+
+Copyright(c) 2020 jwellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef ETL_MUTEX_CLANG_INCLUDED
+#define ETL_MUTEX_CLANG_INCLUDED
+
+#include "mutex_gcc_sync.h"
+
+#endif
diff --git a/include/etl/version.h b/include/etl/version.h
index fc27b601..321a42f5 100644
--- a/include/etl/version.h
+++ b/include/etl/version.h
@@ -39,7 +39,7 @@ SOFTWARE.
 
 #define ETL_VERSION_MAJOR 19
 #define ETL_VERSION_MINOR  3
-#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 d9f410cf..df8ea384 100644
--- a/library.json
+++ b/library.json
@@ -1,6 +1,6 @@
 {
   "name": "Embedded Template Library",
-  "version": "19.3.1",
+  "version": "19.3.2",
   "author s": {
     "name": "John Wellbelove",
     "email": "john.wellbelove@etlcpp.com"
diff --git a/library.properties b/library.properties
index 391e5a89..e71da2f9 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=Embedded Template Library
-version=19.3.1
+version=19.3.2
 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 ff8dd86f..7a9754d1 100644
--- a/support/Release notes.txt	
+++ b/support/Release notes.txt	
@@ -1,3 +1,7 @@
+===============================================================================
+19.3.2
+Added No-STL clang mutex that uses GCC implementation.
+
 ===============================================================================
 19.3.1
 Fixed etl::format_spec constexpr compatibility with C++11.
diff --git a/test/test_queue_mpmc_mutex.cpp b/test/test_queue_mpmc_mutex.cpp
index ed7fb3fe..10866fba 100644
--- a/test/test_queue_mpmc_mutex.cpp
+++ b/test/test_queue_mpmc_mutex.cpp
@@ -80,13 +80,6 @@ namespace
 
   using ItemM = TestDataM<int>;
 
-//  std::ostream& operator <<(std::ostream& os, const Data& data)
-//  {
-//    os << data.a << " " << data.b << " " << data.c << " " << data.d;
-//
-//    return os;
-//  }
-
   SUITE(test_queue_mpmc_mutex)
   {
     //*************************************************************************
diff --git a/test/vs2019/etl.vcxproj b/test/vs2019/etl.vcxproj
index 7fae2640..a43557aa 100644
--- a/test/vs2019/etl.vcxproj
+++ b/test/vs2019/etl.vcxproj
@@ -1291,6 +1291,7 @@
     <ClInclude Include="..\..\include\etl\macros.h" />
     <ClInclude Include="..\..\include\etl\message_packet.h" />
     <ClInclude Include="..\..\include\etl\multi_array.h" />
+    <ClInclude Include="..\..\include\etl\mutex\mutex_clang_sync.h" />
     <ClInclude Include="..\..\include\etl\mutex\mutex_freertos.h" />
     <ClInclude Include="..\..\include\etl\negative.h" />
     <ClInclude Include="..\..\include\etl\null_type.h" />
diff --git a/test/vs2019/etl.vcxproj.filters b/test/vs2019/etl.vcxproj.filters
index 2c69e527..9ab6eff0 100644
--- a/test/vs2019/etl.vcxproj.filters
+++ b/test/vs2019/etl.vcxproj.filters
@@ -894,6 +894,9 @@
     <ClInclude Include="..\..\include\etl\buffer_descriptors.h">
       <Filter>ETL\Containers</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\etl\mutex\mutex_clang_sync.h">
+      <Filter>ETL\Utilities\Mutex</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\main.cpp">