diff --git a/visualc/VS2010/mbedTLS.vcxproj b/visualc/VS2010/mbedTLS.vcxproj
index b243b73..3e9d14a 100644
--- a/visualc/VS2010/mbedTLS.vcxproj
+++ b/visualc/VS2010/mbedTLS.vcxproj
@@ -241,6 +241,7 @@
     <ClInclude Include="..\..\tests\include\test\drivers\cipher.h" />
     <ClInclude Include="..\..\tests\include\test\drivers\keygen.h" />
     <ClInclude Include="..\..\tests\include\test\drivers\signature.h" />
+    <ClInclude Include="..\..\tests\include\test\drivers\size.h" />
     <ClInclude Include="..\..\tests\include\test\drivers\test_driver.h" />
     <ClInclude Include="..\..\library\common.h" />
     <ClInclude Include="..\..\library\psa_crypto_core.h" />