diff --git a/configuration/configure.ac b/configuration/configure.ac
index 06b4389..31f6af3 100644
--- a/configuration/configure.ac
+++ b/configuration/configure.ac
@@ -138,6 +138,19 @@
 
 
 dnl
+dnl PlantUML
+dnl
+AC_PATH_JARFILE(plantuml, PLANTUML, [/opt/local/share/java /sw/share/java /usr/local/share/java /usr/share/java /opt/local/lib/java /sw/lib/java /usr/local/lib/java /usr/lib/java ${HOME}/Library/Java /Library/Java /System/Library/Java])
+AC_MSG_CHECKING([for PlantUML])
+AS_IF([$PLANTUML_AVAILABLE],
+	  [AC_SUBST([PLANTUML],
+	  ["${JAVA} -jar ${PLANTUML_JAR}"])
+AC_MSG_RESULT([$PLANTUML])],
+[	AC_MSG_RESULT([no])
+	AC_MSG_ERROR([could not find PlantUML])])
+
+
+dnl
 dnl XML manipulation.
 dnl
 AC_PATH_PROG(XMLLINT, xmllint)