--- doc/Makefile.in.orig	2014-06-26 15:34:58.000000000 -0400
+++ doc/Makefile.in	2014-06-28 09:44:31.000000000 -0400
@@ -564,7 +564,7 @@
 
 # The rest of the Makefile is enabled only if we have asciidoc
 
-@HAVE_ASCIIDOC_TRUE@ASCIIDOC_ICONS_DIR ?= /usr/share/asciidoc/images/icons
+@HAVE_ASCIIDOC_TRUE@ASCIIDOC_ICONS_DIR ?= ${prefix}/etc/asciidoc/images/icons
 
 @HAVE_ASCIIDOC_TRUE@%.html: $$*.txt $(ASCIIDOC_CONF)
 @HAVE_ASCIIDOC_TRUE@	@if ! test -d $(ASCIIDOC_ICONS_DIR); then \