diff --git a/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst b/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst
index cb30dc36d..d8e8af672 100644
--- a/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst
+++ b/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst
@@ -756,6 +756,7 @@ They are
 :math:`[R_1, -t]`,
 :math:`[R_2, t]`,
 :math:`[R_2, -t]`.
+By decomposing ``E``, you can only get the direction of the translation, so the function returns unit ``t``.
 
 
 recoverPose