diff --git a/src/main/msp/msp_serial.c b/src/main/msp/msp_serial.c
index 62bae07dcf..bbcb867df4 100644
--- a/src/main/msp/msp_serial.c
+++ b/src/main/msp/msp_serial.c
@@ -298,6 +298,7 @@ static int mspSerialSendFrame(mspPort_t *msp, const uint8_t * hdr, int hdrLen, c
         delayMicroseconds((int)serialTxBytesFree(msp->port) * perByteCostUs);
 #else
         return 0;
+#endif
     }
 
     // Transmit frame