diff --git a/doc/Makefile.am b/doc/Makefile.am
index 7db29cc..5978445 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,5 +1,5 @@
 SHELL = /bin/sh
-TXT2MAN = ./txt2man
+TXT2MAN = $(srcdir)/txt2man
 PRODUCT = MDBTools
 
 dist_man_MANS =