diff --git a/src/libutil/windows/windows-async-pipe.cc b/src/libutil/windows/windows-async-pipe.cc
index d47930a1b..da47c37a8 100644
--- a/src/libutil/windows/windows-async-pipe.cc
+++ b/src/libutil/windows/windows-async-pipe.cc
@@ -1,7 +1,8 @@
-#include "nix/util/windows-async-pipe.hh"
-#include "nix/util/windows-error.hh"
+
 
 #ifdef _WIN32
+#  include "nix/util/windows-async-pipe.hh"
+#  include "nix/util/windows-error.hh"
 
 namespace nix::windows {
 
diff --git a/src/libutil/windows/windows-error.cc b/src/libutil/windows/windows-error.cc
index 1e7aff830..0761bdfd5 100644
--- a/src/libutil/windows/windows-error.cc
+++ b/src/libutil/windows/windows-error.cc
@@ -1,6 +1,5 @@
-#include "nix/util/windows-error.hh"
-
 #ifdef _WIN32
+#include "nix/util/windows-error.hh"
 #include <error.h>
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>