diff --git a/backends/frotz/dfrotz/README b/backends/frotz/dfrotz/README
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index 0000000000000000000000000000000000000000..3176a8424b62a3be964df2af56e98a7795baf314
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+++ b/backends/frotz/dfrotz/README
@@ -0,0 +1,2 @@
+This is patched version of dfrotz. frotz_backend won't work with dfrotz from
+your distribution.
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