diff --git a/definitions/Definitions.vcxproj b/definitions/Definitions.vcxproj
index 31746a12..60ed6fe7 100644
--- a/definitions/Definitions.vcxproj
+++ b/definitions/Definitions.vcxproj
@@ -285,6 +285,9 @@
       <OutputItemType>ClCompile</OutputItemType>
       <TreatOutputAsContent>true</TreatOutputAsContent>
     </CustomBuild>
+    <PostBuildEvent>
+      <Command>copy $(ProjectDir)definitions.h $(ProjectDir)..\interfaces</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
@@ -330,6 +333,9 @@
       <OutputItemType>ClCompile</OutputItemType>
       <TreatOutputAsContent>true</TreatOutputAsContent>
     </CustomBuild>
+    <PostBuildEvent>
+      <Command>copy $(ProjectDir)definitions.h $(ProjectDir)..\interfaces</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
@@ -379,6 +385,9 @@
       <OutputItemType>ClCompile</OutputItemType>
       <TreatOutputAsContent>true</TreatOutputAsContent>
     </CustomBuild>
+    <PostBuildEvent>
+      <Command>copy $(ProjectDir)definitions.h $(ProjectDir)..\interfaces</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <ClCompile>
@@ -428,6 +437,9 @@
       <OutputItemType>ClCompile</OutputItemType>
       <TreatOutputAsContent>true</TreatOutputAsContent>
     </CustomBuild>
+    <PostBuildEvent>
+      <Command>copy $(ProjectDir)definitions.h $(ProjectDir)..\interfaces</Command>
+    </PostBuildEvent>
   </ItemDefinitionGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">