diff --git a/matlab/tfgm/tf_tools/compute_ambiguity_function.m b/matlab/tfgm/tf_tools/compute_ambiguity_function.m
index 313667488ae6c749e57a2a2a7759b1bd3932c5f6..046081b341fef7a02be15ee7de5dfb242504b827 100644
--- a/matlab/tfgm/tf_tools/compute_ambiguity_function.m
+++ b/matlab/tfgm/tf_tools/compute_ambiguity_function.m
@@ -1,4 +1,4 @@
-function w = compute_ambiguity_function(w, dgt ,apply_fftshift)
+function w = compute_ambiguity_function(w, dgt, apply_fftshift)
 %% x = compute_ambiguity_function(x, dgt ,fftshift_)
 % Compute the ambiguity function of the window
 %
@@ -10,7 +10,7 @@ function w = compute_ambiguity_function(w, dgt ,apply_fftshift)
 %
 %Author: Marina KREME
 %%
-
+apply_fftshift = [upper(apply_fftshift(1)),apply_fftshift(2:end)];
 switch apply_fftshift
     
     case 'True'