diff --git a/bbn_wave_freq_m5atomS3/Kalman.h b/bbn_wave_freq_m5atomS3/Kalman.h
index 86f3385..e9d808c 100644
--- a/bbn_wave_freq_m5atomS3/Kalman.h
+++ b/bbn_wave_freq_m5atomS3/Kalman.h
@@ -27,7 +27,7 @@ typedef struct {
 
   /*!
      \brief System covariance matrix
-     \see A
+     \see F
   */
   matrix_t P;