diff --git a/msvc_extra_headers/unistd.h.input b/msvc_extra_headers/unistd.h.input
new file mode 100644
index 0000000000..0f8743b164
--- /dev/null
+++ b/msvc_extra_headers/unistd.h.input
@@ -0,0 +1,4 @@
+/*
+** Emtpy file to prevent Win32 compiler from complaining that the
+** file doesn't exist.
+*/