diff --git a/contrib/build-linux/appimage/README.md b/contrib/build-linux/appimage/README.md
index b4c8f8faa..cccc884da 100644
--- a/contrib/build-linux/appimage/README.md
+++ b/contrib/build-linux/appimage/README.md
@@ -47,3 +47,20 @@ see [issue #5159](https://github.com/spesmilo/electrum/issues/5159).
 
 ### How can I see what is included in the AppImage?
 Execute the binary as follows: `./electrum*.AppImage --appimage-extract`
+
+### How to investigate diff between binaries if reproducibility fails?
+```
+cd dist/
+./electrum-*-x86_64.AppImage1 --appimage-extract
+mv squashfs-root/ squashfs-root1/
+./electrum-*-x86_64.AppImage2 --appimage-extract
+mv squashfs-root/ squashfs-root2/
+$(cd squashfs-root1; find -type f -exec sha256sum '{}' \; > ./../sha256sum1)
+$(cd squashfs-root2; find -type f -exec sha256sum '{}' \; > ./../sha256sum2)
+diff sha256sum1 sha256sum2 > d
+cat d
+```
+
+Useful binary comparison tools:
+- vbindiff
+- diffoscope