diff --git a/gym_pybullet_drones/envs/BetaAviary.py b/gym_pybullet_drones/envs/BetaAviary.py
index e4d37a2e4..d8338a463 100644
--- a/gym_pybullet_drones/envs/BetaAviary.py
+++ b/gym_pybullet_drones/envs/BetaAviary.py
@@ -195,7 +195,7 @@ def _actionSpace(self):
         Returns
         -------
         spaces.Box
-            An ndarray of shape (NUM_DRONES, 4) for the commanded RPMs.
+            An ndarray of shape (NUM_DRONES, 4) for the commanded CTBR to Betaflight SITL.
 
         """
         #### Action vector ######## P0            P1            P2            P3