diff --git a/docs/aoa/sensors.rst b/docs/aoa/sensors.rst
index 30884dd4..e637af61 100644
--- a/docs/aoa/sensors.rst
+++ b/docs/aoa/sensors.rst
@@ -28,4 +28,10 @@ There is no alert on this information.
     If a sensors has temperature and fan speed with the same name unit,
     it is possible to alias it using:
     unitname_temperature_core_alias=Alias for temp
-    unitname_fan_speed_alias=Alias for fan speed
\ No newline at end of file
+    unitname_fan_speed_alias=Alias for fan speed
+
+.. note 4::
+    The plugin could crash on some operating system (FreeBSD) with the
+    TCP or UDP blackhole option > 0 (see issue #2106). In this case, you
+    should disable the sensors (--disable-plugin sensors or from the
+    configuration file).
\ No newline at end of file