diff --git a/Virtual Sensing/Remote Microphone Technique/MATLAB/Functions/obsFiltEstTD.m b/Virtual Sensing/Remote Microphone Technique/MATLAB/Functions/obsFiltEstTD.m
index dcd0f6bcf2854612c350c8412872c67e5af1ca4e..f5c97da2954a20257e5293064e3c84d7942d0053 100644
--- a/Virtual Sensing/Remote Microphone Technique/MATLAB/Functions/obsFiltEstTD.m	
+++ b/Virtual Sensing/Remote Microphone Technique/MATLAB/Functions/obsFiltEstTD.m	
@@ -92,7 +92,7 @@ function [estPerMic, est, err, estMean, errMean] = obsFiltEstTD(m, O, e)
     % ====================================================
     % Replicate observation filters if only one set is provided
     if size(O, 4) ~= size(m, 3)
-        O = repmat(O, size(O, 1), size(O, 2), size(O, 3), size(m, 3));
+        O = repmat(O, 1, 1, 1, size(m, 3));
     end
 
     % ====================================================