-#ifndef __BIT_TYPES_DEFINED__
-#define __BIT_TYPES_DEFINED__
-
-typedef __u8 u_int8_t;
-typedef __u16 u_int16_t;
-typedef __u32 u_int32_t;
-typedef __u64 u_int64_t;
-
-#endif /* !(__BIT_TYPES_DEFINED__) */
+/* Linux-specific? */
+typedef uint8_t u_int8_t;
+typedef uint16_t u_int16_t;
+typedef uint32_t u_int32_t;
+typedef uint64_t u_int64_t;