diff --git a/doc/Makefile.am b/doc/Makefile.am
index ca83c5930..3a091dc21 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,6 +1,7 @@
+EXTRA_DIST=	miller.1.txt miller.1
 man1_MANS=	miller.1
 
 MAINTAINERCLEANFILES=	miller.1
 
-miller.1:
+miller.1: miller.1.txt
 	a2x -d manpage -f manpage miller.1.txt