diff --git a/configuration/configure.ac b/configuration/configure.ac
index c1b1fa0..8e1e3e2 100644
--- a/configuration/configure.ac
+++ b/configuration/configure.ac
@@ -106,6 +106,7 @@
 
 dnl Java stuff.
 AX_PROG_JAVA
+AX_PROG_JAVAC
 dnl AX_CHECK_CLASS([org.apache.xml.resolver.apps.resolver])
 dnl AX_CHECK_CLASS([net.sf.saxon.Transform])