diff --git a/main.h b/main.h
index 97a865cc..6d72daf3 100644
--- a/main.h
+++ b/main.h
@@ -48,7 +48,9 @@
 #define GPS2 15
 #define GPS3 16
 #define DTEMP 17
-#define XS1 18
+#define XS1 19
+#define XS2 20
+#define XS3 21
 
 #define RSSI 0
 #define IHU_TEMP 2