diff --git a/libraries/SRV_Channel/SRV_Channel_aux.cpp b/libraries/SRV_Channel/SRV_Channel_aux.cpp
index e3cc9b34ce..a4a30d2f67 100644
--- a/libraries/SRV_Channel/SRV_Channel_aux.cpp
+++ b/libraries/SRV_Channel/SRV_Channel_aux.cpp
@@ -38,10 +38,6 @@ void SRV_Channel::output_ch(void)
     case k_rcin1 ... k_rcin16: // rc pass-thru
         passthrough_from = int8_t(function - k_rcin1);
         break;
-    case k_motor1 ... k_motor8:
-    case k_motor9 ... k_motor12:
-        // handled by AP_Motors::rc_write()
-        return;
     }
     if (passthrough_from != -1) {
         // we are doing passthrough from input to output for this channel