diff --git a/config+lt b/config+lt
index 86af4bbf..f1b93c0e 100755
--- a/config+lt
+++ b/config+lt
@@ -18,5 +18,9 @@
 
 cp configure.ac+lt configure.ac
 autoreconf -i
+if test $? -ne 0; then
+    echo autoreconf failed
+    exit $?
+fi
 echo Reconfiguring with "$@"
 ./configure "$@"