diff --git a/DqnUnitTest.cpp b/DqnUnitTest.cpp
index 9397f71..5f9e691 100644
--- a/DqnUnitTest.cpp
+++ b/DqnUnitTest.cpp
@@ -1,3 +1,8 @@
+#define WIN32_MEAN_AND_LEAN
+#include <Winsock2.h>
+#include <ws2tcpip.h>
+#include <Windows.h>
+
 #if (defined(_WIN32) || defined(_WIN64))
     #define DQN_WIN32_IMPLEMENTATION
     #include "Windows.h"
@@ -136,6 +141,7 @@ void LogHeader(char const *funcName)
 }
 
 #include "DqnFixedString.cpp"
+#include "DqnOS.cpp"
 
 void HandmadeMathVerifyMat4(DqnMat4 dqnMat, hmm_mat4 hmmMat)
 {
@@ -2897,7 +2903,7 @@ int main(void)
     DqnFixedString_Test();
 
 #ifdef DQN_PLATFORM_HEADER
-    // DqnOS_Test();
+    DqnOS_Test();
     DqnFile_Test();
     DqnTimer_Test();
     DqnJobQueue_Test();
diff --git a/build.bat b/build.bat
index f8d9393..6665ee8 100644
--- a/build.bat
+++ b/build.bat
@@ -58,7 +58,7 @@ REM Include directories
 set IncludeFlags=
 
 REM Link libraries
-set LinkLibraries=user32.lib
+set LinkLibraries=user32.lib ws2_32.lib
 
 REM incrmenetal:no, turn incremental builds off
 REM opt:ref, try to remove functions from libs that are referenced at all