diff --git a/README.md b/README.md
index 4361648..c03843b 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,13 @@ Comments/Suggestions/Bugs to:
 > for more details). The results of texture synthesis are still qualitatively
 > similar.
 
+> [!WARNING]
+>
+>  In https://github.com/LabForComputationalVision/textureSynth/pull/5, a small
+>  change was made to the plotting code for compatibility with recent versions
+>  of matlab. The code now works with Matlab >= 2023. Back-compatibility is
+>  unclear.
+
 ## INSTALLATION
 
 1)  download and unpack the code. You can put the code anywhere on your
diff --git a/textureSynthesis.m b/textureSynthesis.m
index 378fbfe..e6de718 100644
--- a/textureSynthesis.m
+++ b/textureSynthesis.m
@@ -117,14 +117,14 @@
 	end
 end
 
-imf = max(1,gcf-1); snrf = imf+1;
+imf = max(1,get(gcf,'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);
+imf = max(1,get(gcf, 'Number')-1);
 figure(imf);   
 clf;showIm(im,'auto',1); title(sprintf('iteration 0'));