diff -r 9833fd86736b -r 1bc6e9263ada main/Kconfig.projbuild
--- a/main/Kconfig.projbuild	Thu Jun 17 13:58:13 2021 +0200
+++ b/main/Kconfig.projbuild	Sat Jun 19 20:46:42 2021 +0200
@@ -55,6 +55,18 @@
 
                 GPIOs 35-39 are input-only so cannot be used as outputs.
 
+config PWM_MLT_GPIO
+    int "MLT PWM GPIO number"
+	range 0 34
+	default 0
+	help	GPIO number (IOxx) to the PWM pin for the MLT kettle. This is used for systems that can
+		control the heating using a PWM signal. A Hendi induction cooker for example.
+		Even when not used, this pin must be defined.
+
+		Some GPIOs are used for other purposes (flash connections, etc.) and cannot be used to drive PWM.
+
+		GPIOs 35-39 are input-only so cannot be used as PWM outputs.
+
 config SSR_HLT_GPIO
     int "HLT SSR GPIO number"
         range 0 34