diff --git a/software/calculateMovieDisplacementField.m b/software/calculateMovieDisplacementField.m
index 4670cec..201c1e7 100644
--- a/software/calculateMovieDisplacementField.m
+++ b/software/calculateMovieDisplacementField.m
@@ -140,7 +140,7 @@ function calculateMovieDisplacementField(movieData,varargin)
     displField(nFrames)=struct('pos',[],'vec',[]);
 else
     % Load old displacement field structure 
-    displField=s.displField;
+    displField=sDisp.displField;
 end
 
 displFieldProc.setOutFilePaths(outputFile);
@@ -527,4 +527,4 @@ function calculateMovieDisplacementField(movieData,varargin)
 % Close waitbar
 if ishandle(wtBar), close(wtBar); end
 
-disp('Finished calculating displacement field!')
\ No newline at end of file
+disp('Finished calculating displacement field!')