diff --git a/resources/ui_layout/printer_fff.ui b/resources/ui_layout/printer_fff.ui
index 0c3844e46..9621af511 100644
--- a/resources/ui_layout/printer_fff.ui
+++ b/resources/ui_layout/printer_fff.ui
@@ -22,6 +22,7 @@ group:Cooling fan
 		setting:label$Only for overhangs:fan_speedup_overhangs
 	end_line
 	setting:label$Kickstart duration:fan_kickstart
+	setting:fan_percentage
 group:Thumbnails
 	line:Size for Gcode
 		setting:id$0:label$Small:thumbnails
diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index 6c5a8c6f6..037a7fc22 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -669,6 +669,7 @@ const std::vector<std::string>& Preset::printer_options()
             "fan_kickstart",
             "fan_speedup_overhangs",
             "fan_speedup_time",
+            "fan_percentage",
             "gcode_flavor", 
             "gcode_precision_xyz",
             "use_relative_e_distances",
diff --git a/src/libslic3r/Print.cpp b/src/libslic3r/Print.cpp
index e1902bd97..b65ed1c47 100644
--- a/src/libslic3r/Print.cpp
+++ b/src/libslic3r/Print.cpp
@@ -105,6 +105,7 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
         "fan_kickstart",
         "fan_speedup_overhangs",
         "fan_speedup_time",
+        "fan_percentage",
         "filament_colour",
         "filament_diameter",
         "filament_density",
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 1c442d4ce..c98d34f6d 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -5217,6 +5217,7 @@ void PrintConfigDef::to_prusa(t_config_option_key& opt_key, std::string& value,
 "exact_last_layer_height",
 "fan_speedup_time",
 "fan_speedup_overhangs",
+"fan_percentage",
 "fan_kickstart",
 "machine_max_acceleration_travel",
 "max_speed_reduction",