diff --git a/apps/sensors/sensors.cpp b/apps/sensors/sensors.cpp
index d725c7727f..1f3f7707e2 100644
--- a/apps/sensors/sensors.cpp
+++ b/apps/sensors/sensors.cpp
@@ -1157,7 +1157,7 @@ Sensors::ppm_poll()
 				_rc.chan[i].scaled = (rc_input.values[i] - _parameters.trim[i] - _parameters.dz[i]) / (float)(_parameters.max[i] - _parameters.trim[i] - _parameters.dz[i]);
 
 			} else if (rc_input.values[i] < (_parameters.trim[i] - _parameters.dz[i])) {
-				_rc.chan[i].scaled = (rc_input.values[i] - _parameters.trim[i] - _parameters.dz[i]) / (float)(_parameters.trim[i] - _parameters.min[i] - _parameters.dz[i]);
+				_rc.chan[i].scaled = (rc_input.values[i] - _parameters.trim[i] + _parameters.dz[i]) / (float)(_parameters.trim[i] - _parameters.min[i] - _parameters.dz[i]);
 
 			} else {
 				/* in the configured dead zone, output zero */