--- a/doc/Makefile
+++ b/doc/Makefile
@@ -48,8 +48,8 @@
 ../source/help_topic.h ../source/help_data.h: .version help.etx setext
 	@ echo "Creating NEdit help code `cat .version`"
 	@ ./setext -m -v version="`cat .version`" help.etx
-	@ mv -f help_topic.h ../source
-	@ mv -f help_data.h ../source
+	@ cp -f help_topic.h ../source
+	@ cp -f help_data.h ../source
 
 nedit.html: .version help.etx setext
 	@ echo "Creating NEdit HTML documentation..."