diff --git a/Troubled_Cell_Detector.py b/Troubled_Cell_Detector.py
index e558187f93d846e0cb6ee3455fbefdb882ca749d..c4840d314c5d58637d61016aa625e81ad7c3b5dc 100644
--- a/Troubled_Cell_Detector.py
+++ b/Troubled_Cell_Detector.py
@@ -648,7 +648,7 @@ class Theoretical(WaveletDetector):
         ----------
         multiwavelet_coeffs : np.array
             Matrix of multiwavelet coefficients.
-        cell
+        cell : int
             Index of cell.
         max_avg
             Maximum average of projection.