diff --git a/configuration/configure.ac b/configuration/configure.ac
index 8e1e3e2..4f7dc88 100644
--- a/configuration/configure.ac
+++ b/configuration/configure.ac
@@ -107,6 +107,7 @@
 dnl Java stuff.
 AX_PROG_JAVA
 AX_PROG_JAVAC
+AX_PROG_JAR
 dnl AX_CHECK_CLASS([org.apache.xml.resolver.apps.resolver])
 dnl AX_CHECK_CLASS([net.sf.saxon.Transform])