diff --git a/textureSynthesis.m b/textureSynthesis.m
index 378fbfe..f04c8be 100644
--- a/textureSynthesis.m
+++ b/textureSynthesis.m
@@ -117,14 +117,16 @@
 	end
 end
 
-imf = max(1,gcf-1); snrf = imf+1;
+gcf_copy = gcf;
+imf = max(1, gcf_copy.Number-1); snrf = imf+1;
 figure(imf);  clf
 subplot(1,2,1); grayRange = showIm(im,'auto',1); title('Starting image');
 drawnow
 
 prev_im=im;
 
-imf = max(1,gcf-1);
+gcf_copy = gcf;
+imf = max(1,gcf_copy.Number-1);
 figure(imf);   
 clf;showIm(im,'auto',1); title(sprintf('iteration 0'));