diff --git a/lemon/CMakeLists.txt b/lemon/CMakeLists.txt
--- a/lemon/CMakeLists.txt
+++ b/lemon/CMakeLists.txt
@@ -4,7 +4,9 @@
   arg_parser.cc
   base.cc
   color.cc
-  random.cc)
+  random.cc
+  bits/windows.cc
+)
 
 INSTALL(
   TARGETS lemon