diff --git a/c4.c b/c4.c
index 29e35b1..5ec9052 100644
--- a/c4.c
+++ b/c4.c
@@ -9,7 +9,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <memory.h>
-#include <unistd.h>
+
+// IF COMPILING ON WINDOWS:
+//	#include <io.h>
+// ELSE:
+	#include <unistd.h>
+// ENDIF
+
 #include <fcntl.h>
 
 char *p, *lp, // current position in source code