diff --git a/apps/sensors/sensors.cpp b/apps/sensors/sensors.cpp
index b63bfb195a..94dbd0b21e 100644
--- a/apps/sensors/sensors.cpp
+++ b/apps/sensors/sensors.cpp
@@ -1001,7 +1001,7 @@ Sensors::ppm_poll()
 			// XXX hardcoded for testing purposes, replace with inverted delta mixer from ROMFS
 
 			/* roll input - mixed roll and pitch channels */
-			manual_control.roll = _rc.chan[_rc.function[ROLL]].scaled - _rc.chan[_rc.function[PITCH]].scaled;
+			manual_control.roll = -0.5f * (_rc.chan[_rc.function[ROLL]].scaled - _rc.chan[_rc.function[PITCH]].scaled);
 			/* pitch input - mixed roll and pitch channels */
 			manual_control.pitch = -0.5f * (_rc.chan[_rc.function[ROLL]].scaled + _rc.chan[_rc.function[PITCH]].scaled);
 			/* yaw input - stick right is positive and positive rotation */