diff --git a/modules/calib3d/include/opencv2/calib3d.hpp b/modules/calib3d/include/opencv2/calib3d.hpp
index 59e033fde..e0c31612e 100644
--- a/modules/calib3d/include/opencv2/calib3d.hpp
+++ b/modules/calib3d/include/opencv2/calib3d.hpp
@@ -56,9 +56,9 @@ enum { LMEDS  = 4, //!< least-median algorithm
      };
 
 enum { SOLVEPNP_ITERATIVE = 0,
-	   SOLVEPNP_EPNP      = 1, // F.Moreno-Noguer, V.Lepetit and P.Fua "EPnP: Efficient Perspective-n-Point Camera Pose Estimation"
-	   SOLVEPNP_P3P       = 2, // X.S. Gao, X.-R. Hou, J. Tang, H.-F. Chang; "Complete Solution Classification for the Perspective-Three-Point Problem"
-	   SOLVEPNP_DLS       = 3  // Joel A. Hesch and Stergios I. Roumeliotis. "A Direct Least-Squares (DLS) Method for PnP"
+       SOLVEPNP_EPNP      = 1, // F.Moreno-Noguer, V.Lepetit and P.Fua "EPnP: Efficient Perspective-n-Point Camera Pose Estimation"
+       SOLVEPNP_P3P       = 2, // X.S. Gao, X.-R. Hou, J. Tang, H.-F. Chang; "Complete Solution Classification for the Perspective-Three-Point Problem"
+       SOLVEPNP_DLS       = 3  // Joel A. Hesch and Stergios I. Roumeliotis. "A Direct Least-Squares (DLS) Method for PnP"
 };
 
 enum { CALIB_CB_ADAPTIVE_THRESH = 1,