diff --git a/src/fdlib.h b/src/fdlib.h
index 31fab13bb35e8ce57bd206f90567a065fa77d376..ac038faad91de9a59c4a378fba21633cbb27927c 100644
--- a/src/fdlib.h
+++ b/src/fdlib.h
@@ -1,5 +1,5 @@
 /*
- * $Id: fdlib.h,v 1.13 1998/03/28 15:08:12 grubba Exp $
+ * $Id: fdlib.h,v 1.14 1998/04/06 04:22:11 hubbe Exp $
  */
 #ifndef FDLIB_H
 #define FDLIB_H
@@ -291,6 +291,18 @@ typedef struct my_fd_set_s
 #define UNIX_SOCKET_CAPABILITIES (fd_INTERPROCESSABLE | fd_BIDIRECTIONAL | fd_CAN_NONBLOCK)
 #define SOCKET_CAPABILITIES (fd_INTERPROCESSABLE | fd_BIDIRECTIONAL | fd_CAN_NONBLOCK | fd_CAN_SHUTDOWN)
 
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+#ifndef SEEK_CUR
+#define SEEK_CUR 1
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
 #endif
 
 #endif