diff --git a/docbook-mathml/PKGBUILD b/docbook-mathml/PKGBUILD
index 5d9aa2de..93dad228 100644
--- a/docbook-mathml/PKGBUILD
+++ b/docbook-mathml/PKGBUILD
@@ -3,7 +3,7 @@
 
 pkgname=docbook-mathml
 pkgver=1.1CR1
-pkgrel=1
+pkgrel=2
 pkgdesc="MathML XML scheme"
 arch=('any')
 url="https://www.oasis-open.org/docbook/"
diff --git a/docbook-mathml/docbook-mathml.install b/docbook-mathml/docbook-mathml.install
index b7605297..df77ed1c 100644
--- a/docbook-mathml/docbook-mathml.install
+++ b/docbook-mathml/docbook-mathml.install
@@ -1,19 +1,19 @@
 post_install() {
   if [ ! -e etc/xml/catalog ]; then
-    xmlcatalog --noout --create etc/xml/catalog
+    usr/bin/xmlcatalog --noout --create etc/xml/catalog
   fi
-  xmlcatalog --noout --add "public" \
+  usr/bin/xmlcatalog --noout --add "public" \
     "-//OASIS//DTD DocBook MathML Module V1.1CR1//EN" \
     "file:///usr/share/xml/docbook/mathml/1.1CR1/dbmathml.dtd" \
     "etc/xml/catalog"
 
-  xmlcatalog --noout --add "system" \
+  usr/bin/xmlcatalog --noout --add "system" \
     "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd" \
     "file:///usr/share/xml/docbook/mathml/1.1CR1/dbmathml.dtd" \
     "etc/xml/catalog"
 }
 
 post_remove() {
-  xmlcatalog --noout --del "-//OASIS//DTD DocBook MathML Module V1.1CR1//EN" etc/xml/catalog
-  xmlcatalog --noout --del "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd" etc/xml/catalog
+  usr/bin/xmlcatalog --noout --del "-//OASIS//DTD DocBook MathML Module V1.1CR1//EN" etc/xml/catalog
+  usr/bin/xmlcatalog --noout --del "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd" etc/xml/catalog
 }