diff --git a/slcand.c b/slcand.c
index 55775da..c4c81c5 100644
--- a/slcand.c
+++ b/slcand.c
@@ -50,9 +50,6 @@
 /* The length of ttypath buffer */
 #define TTYPATH_LENGTH	64
 
-#define EXIT_SUCCESS 0
-#define EXIT_FAILURE 1
-
 /* UART flow control types */
 #define FLOW_NONE 0
 #define FLOW_HW 1