diff --git a/js/msp/MSPHelper.js b/js/msp/MSPHelper.js
index c399dc9d..03979dc0 100644
--- a/js/msp/MSPHelper.js
+++ b/js/msp/MSPHelper.js
@@ -545,7 +545,7 @@ MspHelper.prototype.process_data = function(dataHandler) {
             if (semver.gte(CONFIG.apiVersion, "1.20.0")) {
                 RX_CONFIG.rcInterpolation = data.readU8();
                 RX_CONFIG.rcInterpolationInterval = data.readU8();
-                RX_CONFIG.airModeActivateThreshold = data.readU8();
+                RX_CONFIG.airModeActivateThreshold = data.readU16();
             } else {
                 RX_CONFIG.rcInterpolation = 0;
                 RX_CONFIG.rcInterpolationInterval = 0;