diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,7 @@ AC_PROG_LIBTOOL
 AM_INIT_AUTOMAKE
 AM_PROG_CC_C_O
 AM_PATH_CHECK
+AM_PATH_XML2(2.7.2)
 
 PKG_PROG_PKG_CONFIG(0.17.2)