diff --git a/src/opus.vcxproj b/src/opus.vcxproj
index dad27d4eafc471b4911cec78c63bc3bc0076327d..a04d4c60a265078a245a4496ca1bdca0f780c72a 100644
--- a/src/opus.vcxproj
+++ b/src/opus.vcxproj
@@ -208,6 +208,7 @@
     <ClInclude Include="..\include\opus.h" />
     <ClInclude Include="..\include\opus_defines.h" />
     <ClInclude Include="..\include\opus_types.h" />
+    <ClInclude Include="..\include\opus_multistream.h" />
     <ClInclude Include="..\win32\config.h" />
     <ClInclude Include="opus_private.h" />
   </ItemGroup>
diff --git a/src/opus.vcxproj.filters b/src/opus.vcxproj.filters
index d0bec0eecbdbe15372d915e3212ee0ae47dcef1b..1d1cd84fe739c8309b7b7fc53e953b6dae3c1814 100644
--- a/src/opus.vcxproj.filters
+++ b/src/opus.vcxproj.filters
@@ -68,5 +68,8 @@
     <ClInclude Include="..\include\opus_types.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\include\opus_multistream.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file