diff --git a/includes/definitions/riello.yaml b/includes/definitions/riello.yaml
index 037b5fc74e..ee1840547d 100644
--- a/includes/definitions/riello.yaml
+++ b/includes/definitions/riello.yaml
@@ -11,3 +11,4 @@ discovery:
     - sysObjectID:
         - .1.3.6.1.4.1.5491.301
         - .1.3.6.1.4.1.5491.304
+        - .1.3.6.1.4.1.5491.0
diff --git a/tests/snmpsim/riello_204.snmprec b/tests/snmpsim/riello_204.snmprec
new file mode 100644
index 0000000000..4f5228a0ee
--- /dev/null
+++ b/tests/snmpsim/riello_204.snmprec
@@ -0,0 +1,2 @@
+1.3.6.1.2.1.1.1.0|4|Netman 204
+1.3.6.1.2.1.1.2.0|6|1.3.6.1.4.1.5491.0