diff --git a/src/open9x.h b/src/open9x.h
index 3e4095e4b..446139640 100644
--- a/src/open9x.h
+++ b/src/open9x.h
@@ -232,7 +232,7 @@ extern uint16_t DEBUG2;
 #define INP_E_AileDR  1
 #define INP_E_ThrCt   0
 
-#if (defined(JETI) || defined(FRSKY) || defined(ARDUPILOT) || defined(NMEA))
+#if defined(JETI) || defined(FRSKY) || defined(ARDUPILOT) || defined(NMEA)
 #undef INP_E_ThrCt
 #undef INP_E_AileDR
 #define INP_C_ThrCt   6