diff --git a/monitor/gen-fan-monitor-defs.py b/monitor/gen-fan-monitor-defs.py
index bbd8368..dac5de7 100755
--- a/monitor/gen-fan-monitor-defs.py
+++ b/monitor/gen-fan-monitor-defs.py
@@ -55,6 +55,7 @@
                   ${fan_data.get('functional_delay', 0)},
                   ${fan_data.get('allowed_out_of_range_time', {})},
                   ${fan_data['deviation']},
+                  ${fan_data.get('upper_deviation', fan_data['deviation'])},
                   ${fan_data['num_sensors_nonfunc_for_fan_nonfunc']},
                   0, // Monitor start delay - not used in YAML configs
                   0, // Count interval - not used in YAML configs