Index: trunk/FACT++/configure.ac
===================================================================
--- trunk/FACT++/configure.ac	(revision 18583)
+++ trunk/FACT++/configure.ac	(revision 18584)
@@ -386,5 +386,5 @@
 AM_CONDITIONAL(HAS_QT4,       [test "$QT4_VERSION"])
 AM_CONDITIONAL(HAS_SQL,       [test "$MYSQLPP_LIB_DIR" -a "$MYSQLPP_INC_DIR" ])
-AM_CONDITIONAL(HAS_ROOT,      [test "$ROOTEXEC" != no])
+AM_CONDITIONAL(HAS_ROOT,      [test "$ROOTEXEC" != no -a -n "$ROOTVERSION"])
 AM_CONDITIONAL(HAS_ROOT_QT,   [test "$HAVE_ROOT_QT" = yes])
 AM_CONDITIONAL(HAS_CFITSIO,   [test "$HAVE_CFITSIO" = yes])