diff --git a/zlib.vcxproj b/zlib.vcxproj
index 2e33d43..c56706b 100644
--- a/zlib.vcxproj
+++ b/zlib.vcxproj
@@ -119,6 +119,7 @@ copy $(TargetPath) \EgtProg\DllD32</Command>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <ModuleDefinitionFile>zlib.def</ModuleDefinitionFile>
+      <SubSystem>Windows</SubSystem>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -152,6 +153,7 @@ copy $(TargetPath) \EgtProg\DllD64</Command>
     <Link>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <ModuleDefinitionFile>zlib.def</ModuleDefinitionFile>
+      <SubSystem>Windows</SubSystem>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
@@ -191,6 +193,7 @@ copy $(TargetPath) \EgtProg\Dll32</Command>
       <GenerateDebugInformation>false</GenerateDebugInformation>
       <ModuleDefinitionFile>zlib.def</ModuleDefinitionFile>
       <LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
+      <SubSystem>Windows</SubSystem>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -230,6 +233,7 @@ copy $(TargetPath) \EgtProg\Dll64</Command>
       <GenerateDebugInformation>false</GenerateDebugInformation>
       <ModuleDefinitionFile>zlib.def</ModuleDefinitionFile>
       <LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
+      <SubSystem>Windows</SubSystem>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>