diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 2b5dbf2b33..154836fe20 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -4650,6 +4650,19 @@
                         }
                     }
                 },
+                "cool_fan_speed_overhang_factor":
+                {
+                    "label": "Fan Speed Overhang Factor",
+                    "description": "Factor to adjust the fan speed with when overhang walls are printed.",
+                    "unit": "%",
+                    "type": "float",
+                    "minimum_value": "0",
+                    "maximum_value": "200",
+                    "default_value": 100,
+                    "enabled": "cool_fan_enabled",
+                    "settable_per_mesh": false,
+                    "settable_per_extruder": true
+                },
                 "cool_min_layer_time_fan_speed_max":
                 {
                     "label": "Regular/Maximum Fan Speed Threshold",
diff --git a/resources/setting_visibility/advanced.cfg b/resources/setting_visibility/advanced.cfg
index 93c3dc91ef..a6a7a20af0 100644
--- a/resources/setting_visibility/advanced.cfg
+++ b/resources/setting_visibility/advanced.cfg
@@ -98,6 +98,7 @@ cool_min_layer_time
 cool_min_speed
 cool_lift_head
 cool_during_extruder_switch
+cool_fan_speed_overhang_factor
 
 [support]
 support_enable