diff --git a/libnyquist.vcxproj/v120/libnyquist.vcxproj b/libnyquist.vcxproj/v120/libnyquist.vcxproj
index 844a1f6..fed0004 100644
--- a/libnyquist.vcxproj/v120/libnyquist.vcxproj
+++ b/libnyquist.vcxproj/v120/libnyquist.vcxproj
@@ -68,6 +68,7 @@
     <ClInclude Include="$(ProjectDir)..\..\include\libnyquist\VorbisDecoder.h" />
     <ClInclude Include="$(ProjectDir)..\..\include\libnyquist\WavEncoder.h" />
     <ClInclude Include="$(ProjectDir)..\..\include\libnyquist\RiffUtils.h" />
+    <ClInclude Include="..\..\include\libnyquist\IMA4Util.h" />
     <ClInclude Include="..\..\include\libnyquist\MusepackDecoder.h" />
   </ItemGroup>
   <PropertyGroup Label="Globals">
diff --git a/libnyquist.vcxproj/v120/libnyquist.vcxproj.filters b/libnyquist.vcxproj/v120/libnyquist.vcxproj.filters
index e05fe97..4df6450 100644
--- a/libnyquist.vcxproj/v120/libnyquist.vcxproj.filters
+++ b/libnyquist.vcxproj/v120/libnyquist.vcxproj.filters
@@ -147,6 +147,9 @@
     <ClInclude Include="..\..\include\libnyquist\MusepackDecoder.h">
       <Filter>include</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\libnyquist\IMA4Util.h">
+      <Filter>include\util</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="include">
diff --git a/libnyquist.vcxproj/v140/libnyquist.vcxproj b/libnyquist.vcxproj/v140/libnyquist.vcxproj
index bb4f532..d1e8879 100644
--- a/libnyquist.vcxproj/v140/libnyquist.vcxproj
+++ b/libnyquist.vcxproj/v140/libnyquist.vcxproj
@@ -68,6 +68,7 @@
     <ClInclude Include="$(ProjectDir)..\..\include\libnyquist\VorbisDecoder.h" />
     <ClInclude Include="$(ProjectDir)..\..\include\libnyquist\WavEncoder.h" />
     <ClInclude Include="$(ProjectDir)..\..\include\libnyquist\RiffUtils.h" />
+    <ClInclude Include="..\..\include\libnyquist\IMA4Util.h" />
     <ClInclude Include="..\..\include\libnyquist\MusepackDecoder.h" />
   </ItemGroup>
   <PropertyGroup Label="Globals">
diff --git a/libnyquist.vcxproj/v140/libnyquist.vcxproj.filters b/libnyquist.vcxproj/v140/libnyquist.vcxproj.filters
index 3d8ba44..71458ee 100644
--- a/libnyquist.vcxproj/v140/libnyquist.vcxproj.filters
+++ b/libnyquist.vcxproj/v140/libnyquist.vcxproj.filters
@@ -147,6 +147,9 @@
     <ClInclude Include="..\..\include\libnyquist\MusepackDecoder.h">
       <Filter>include</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\libnyquist\IMA4Util.h">
+      <Filter>include\util</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="include">