grpc++_unsecure shouldn't depend on grpc but on grpc_unsecure.
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index c33c665..d031a3d 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -489,6 +489,9 @@
<ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_posix.h">
<Filter>include\grpc</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\include\grpc\grpc_security_constants.h">
+ <Filter>include\grpc</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\include\grpc\status.h">
<Filter>include\grpc</Filter>
</ClInclude>