diff --git a/src/blackbox_decode.c b/src/blackbox_decode.c
index d42c88f..7482f10 100644
--- a/src/blackbox_decode.c
+++ b/src/blackbox_decode.c
@@ -939,8 +939,8 @@ void printUsage(const char *argv0)
         "   --unit-amperage <unit>   Current meter unit (raw|mA|A), default is A (amps)\n"
         "   --unit-frame-time <unit> Frame timestamp unit (us|s), default is us (microseconds)\n"
         "   --unit-height <unit>     Height unit (m|cm|ft), default is cm (centimeters)\n"
-        "   --unit-rotation <unit>   Rate of rotation unit (raw|deg/s|rad/s), default is deg/s (degrees per second)\n"
-        "   --unit-acceleration <u>  Acceleration unit (raw|g|m/s2), default is g (9.8m/s/s)\n"
+        "   --unit-rotation <unit>   Rate of rotation unit (raw|deg/s|rad/s), default is raw\n"
+        "   --unit-acceleration <u>  Acceleration unit (raw|g|m/s2), default is raw\n"
         "   --unit-gps-speed <unit>  GPS speed unit (mps|kph|mph), default is mps (meters per second)\n"
         "   --unit-vbat <unit>       Vbat unit (raw|mV|V), default is V (volts)\n"
         "   --merge-gps              Merge GPS data into the main CSV log file instead of writing it separately\n"