--- Makefile.am.orig	2020-12-26 11:31:35.000000000 -0800
+++ Makefile.am	2020-12-26 11:31:25.000000000 -0800
@@ -16,4 +16,4 @@
 pkgconfig_DATA = frei0r.pc
 
 docsdir = ${prefix}/share/doc/${PACKAGE}
-docs_DATA = README.md ChangeLog TODO AUTHORS 
+docs_DATA = README.txt ChangeLog.txt TODO.txt AUTHORS.txt