diff --git a/src/RS485.h b/src/RS485.h
index 8d01799..b2b6009 100644
--- a/src/RS485.h
+++ b/src/RS485.h
@@ -46,6 +46,13 @@
 #endif
 #endif
 
+#ifdef CUSTOM_RS485_DEFAULT_DE_PIN
+# define RS485_DEFAULT_DE_PIN CUSTOM_RS485_DEFAULT_DE_PIN
+#endif
+
+#ifdef CUSTOM_RS485_DEFAULT_RE_PIN
+# define RS485_DEFAULT_RE_PIN CUSTOM_RS485_DEFAULT_RE_PIN
+#endif
 
 #define RS485_DEFAULT_PRE_DELAY 50
 #define RS485_DEFAULT_POST_DELAY 50