diff --git a/reactos/tools/cat.c b/reactos/tools/cat.c
index 79e0741b744..6d606e50dc2 100644
--- a/reactos/tools/cat.c
+++ b/reactos/tools/cat.c
@@ -8,9 +8,17 @@
  *                  Hermès Bélusca - Maïto
  */
 
-#include <fcntl.h>
 #include <stdio.h>
 
+#ifdef _WIN32
+#include <fcntl.h>
+#else
+#define O_TEXT   0x4000
+#define O_BINARY 0x8000
+#define setmode(fd, mode) // This function is useless in *nix world.
+#define stricmp strcasecmp
+#endif
+
 #define ARRAYSIZE(a) (sizeof(a) / sizeof((a)[0]))
 
 void help(void)