diff --git a/tests/meson.build b/tests/meson.build
index b34f43a0..07af5b72 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -188,3 +188,11 @@ foreach executable : test_executables
 		)
 	endforeach
 endforeach
+
+
+# add the ODR-test build project
+executable(
+	'odr_test',
+	[ 'odr_test_1.cpp', 'odr_test_2.cpp' ],
+	include_directories: include_dirs
+)
diff --git a/tests/odr_test_1.cpp b/tests/odr_test_1.cpp
new file mode 100644
index 00000000..26643301
--- /dev/null
+++ b/tests/odr_test_1.cpp
@@ -0,0 +1,8 @@
+#define TOML_ENABLE_UNRELEASED_FEATURES 1
+#define TOML_HEADER_ONLY				1
+#include "../toml.hpp"
+
+int main()
+{
+	return 0;
+}
diff --git a/tests/odr_test_2.cpp b/tests/odr_test_2.cpp
new file mode 100644
index 00000000..49206907
--- /dev/null
+++ b/tests/odr_test_2.cpp
@@ -0,0 +1,3 @@
+#define TOML_ENABLE_UNRELEASED_FEATURES 1
+#define TOML_HEADER_ONLY				1
+#include "../toml.hpp"
diff --git a/tests/vs/odr_test.vcxproj b/tests/vs/odr_test.vcxproj
new file mode 100644
index 00000000..31da6459
--- /dev/null
+++ b/tests/vs/odr_test.vcxproj
@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>16.0</VCProjectVersion>
+    <ProjectGuid>{723FC4CA-0E24-4956-8FDC-E537EA3847AA}</ProjectGuid>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+    <PreferredToolArchitecture>x64</PreferredToolArchitecture>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <Import Project="../../toml++.props" />
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <AdditionalIncludeDirectories>..\tests;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <ExceptionHandling>Sync</ExceptionHandling>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <LanguageStandard>stdcpp17</LanguageStandard>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <WarningLevel>EnableAllWarnings</WarningLevel>
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4127</DisableSpecificWarnings> <!-- conditional expr is constant -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4324</DisableSpecificWarnings> <!-- structure was padded due to alignment specifier -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4464</DisableSpecificWarnings> <!-- relative include path contains '..' -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4505</DisableSpecificWarnings> <!-- unreferenced local function removed -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4514</DisableSpecificWarnings> <!-- unreferenced inline function has been removed -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4577</DisableSpecificWarnings> <!-- 'noexcept' used with no exception handling mode specified -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4582</DisableSpecificWarnings> <!-- constructor is not implicitly called -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4623</DisableSpecificWarnings> <!-- default constructor was implicitly defined as deleted -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4625</DisableSpecificWarnings> <!-- copy constructor was implicitly defined as deleted -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4626</DisableSpecificWarnings> <!-- assignment operator was implicitly defined as deleted -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4710</DisableSpecificWarnings> <!-- function not inlined -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4711</DisableSpecificWarnings> <!-- function selected for automatic expansion -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4738</DisableSpecificWarnings> <!-- storing 32-bit float result in memory -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4820</DisableSpecificWarnings> <!-- N bytes padding added -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4866</DisableSpecificWarnings> <!-- compiler may not enforce ltr eval in operator[] -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4868</DisableSpecificWarnings> <!-- compiler may not enforce ltr eval in initializer list -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);4946</DisableSpecificWarnings> <!-- reinterpret_cast used between related classes -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);5026</DisableSpecificWarnings> <!-- move constructor was implicitly defined as deleted -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);5027</DisableSpecificWarnings> <!-- move assignment operator was implicitly defined as deleted -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);5039</DisableSpecificWarnings> <!-- potentially throwing function passed to 'extern "C"' -->
+    <DisableSpecificWarnings>%(DisableSpecificWarnings);5045</DisableSpecificWarnings> <!-- Compiler will insert Spectre mitigation -->
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <PropertyGroup>
+    <LocalDebuggerWorkingDirectory>$(ProjectDir)..\</LocalDebuggerWorkingDirectory>
+  </PropertyGroup>
+  <ItemGroup>
+    <ClCompile Include="..\odr_test_1.cpp" />
+    <ClCompile Include="..\odr_test_2.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\meson.build" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+</Project>
diff --git a/toml++.sln b/toml++.sln
index 43756a9e..c2b58a7c 100644
--- a/toml++.sln
+++ b/toml++.sln
@@ -89,6 +89,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "tt_decoder", "toml-test\tt_
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "tt_encoder", "toml-test\tt_encoder.vcxproj", "{8F673261-5DFE-4B67-937A-61FC3F0082A2}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "odr_test", "tests\vs\odr_test.vcxproj", "{723FC4CA-0E24-4956-8FDC-E537EA3847AA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x64 = Debug|x64
@@ -253,6 +255,10 @@ Global
 		{8F673261-5DFE-4B67-937A-61FC3F0082A2}.Debug|x64.Build.0 = Debug|x64
 		{8F673261-5DFE-4B67-937A-61FC3F0082A2}.Release|x64.ActiveCfg = Release|x64
 		{8F673261-5DFE-4B67-937A-61FC3F0082A2}.Release|x64.Build.0 = Release|x64
+		{723FC4CA-0E24-4956-8FDC-E537EA3847AA}.Debug|x64.ActiveCfg = Debug|x64
+		{723FC4CA-0E24-4956-8FDC-E537EA3847AA}.Debug|x64.Build.0 = Debug|x64
+		{723FC4CA-0E24-4956-8FDC-E537EA3847AA}.Release|x64.ActiveCfg = Release|x64
+		{723FC4CA-0E24-4956-8FDC-E537EA3847AA}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -297,6 +303,7 @@ Global
 		{407FCAA8-FC2C-424D-B44B-C6A1AFAD757A} = {412816A5-9D22-4A30-BCDF-ABFB54BB3735}
 		{8D19DE49-9687-4305-B59E-21F398415F5A} = {5DE43BF4-4EDD-4A7A-A422-764415BB3224}
 		{8F673261-5DFE-4B67-937A-61FC3F0082A2} = {5DE43BF4-4EDD-4A7A-A422-764415BB3224}
+		{723FC4CA-0E24-4956-8FDC-E537EA3847AA} = {4E25CF88-D7D8-4A9C-A52E-0D78281E82EC}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {0926DDCC-88CD-4839-A82D-D9B99E02A0B1}