diff --git a/json-c.vcxproj b/json-c.vcxproj
index 008d724..c39ef7e 100644
--- a/json-c.vcxproj
+++ b/json-c.vcxproj
@@ -137,6 +137,7 @@ copy json_config.h.win32 json_config.h
     <ClCompile Include="json_util.c" />
     <ClCompile Include="linkhash.c" />
     <ClCompile Include="printbuf.c" />
+    <ClCompile Include="random_seed.c" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="arraylist.h" />
diff --git a/json-c.vcxproj.filters b/json-c.vcxproj.filters
index 8f40caa..63b6fb1 100644
--- a/json-c.vcxproj.filters
+++ b/json-c.vcxproj.filters
@@ -39,6 +39,9 @@
     <ClCompile Include="printbuf.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="random_seed.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="arraylist.h">