diff --git a/src/open9x.h b/src/open9x.h
index cb2df8157..ffb89d1d8 100644
--- a/src/open9x.h
+++ b/src/open9x.h
@@ -654,8 +654,8 @@ extern uint8_t pxxFlag;
 #endif
 
 #define PXX_SEND_RXNUM       0x01
-#define PXX_SEND_FAILSAFE    0x02
-#define PXX_SEND_RANGECHECK  (1 << 1)
+#define PXX_SEND_FAILSAFE    (1 << 4)
+#define PXX_SEND_RANGECHECK  (1 << 5)
 
 #define ZCHAR_MAX (40 + LEN_SPECIAL_CHARS)