diff --git a/src/main/fc/fc_msp.c b/src/main/fc/fc_msp.c
index 2b2d4a8437..0f3d80829a 100644
--- a/src/main/fc/fc_msp.c
+++ b/src/main/fc/fc_msp.c
@@ -3059,7 +3059,7 @@ static mspResult_e mspFcProcessInCommand(uint16_t cmdMSP, sbuf_t *src)
 
     case MSP2_INAV_SET_RATE_DYNAMICS:
 
-        if (dataSize == 8) {
+        if (dataSize == 6) {
             ((controlRateConfig_t*)currentControlRateProfile)->rateDynamics.sensitivityCenter = sbufReadU8(src);
             ((controlRateConfig_t*)currentControlRateProfile)->rateDynamics.sensitivityEnd = sbufReadU8(src);
             ((controlRateConfig_t*)currentControlRateProfile)->rateDynamics.correctionCenter = sbufReadU8(src);