diff --git a/lib/hx509/test_req.in b/lib/hx509/test_req.in
index 3f39bc516..2e5a7ac5e 100644
--- a/lib/hx509/test_req.in
+++ b/lib/hx509/test_req.in
@@ -36,6 +36,9 @@
 
 srcdir="@srcdir@"
 
+if ./hxtool info | grep 'rsa: hx509 null RSA' > /dev/null ; then
+    exit 77
+fi
 
 ./hxtool request-create \
 	 --subject="CN=Love,DC=it,DC=su,DC=se" \