diff --git a/src/main/fc/fc_msp.c b/src/main/fc/fc_msp.c
index c2663fa46..b91b6dacc 100755
--- a/src/main/fc/fc_msp.c
+++ b/src/main/fc/fc_msp.c
@@ -1544,7 +1544,7 @@ static mspResult_e mspFcProcessInCommand(uint8_t cmdMSP, sbuf_t *src)
 
     case MSP_SET_SERVO_CONFIGURATION:
 #ifdef USE_SERVOS
-        if (dataSize != 1 + sizeof(servoParam_t)) {
+        if (dataSize != 1 + 14) {
             return MSP_RESULT_ERROR;
         }
         i = sbufReadU8(src);