diff --git a/firmware/controllers/algo/engine_configuration_generated_structures.h b/firmware/controllers/algo/engine_configuration_generated_structures.h
index e795a39ffa..1e643c739b 100644
--- a/firmware/controllers/algo/engine_configuration_generated_structures.h
+++ b/firmware/controllers/algo/engine_configuration_generated_structures.h
@@ -1,4 +1,4 @@
-// this section was generated automatically by ConfigDefinition.jar based on rusefi_config.txt Fri Jun 15 20:43:23 EDT 2018
+// this section was generated automatically by ConfigDefinition.jar based on rusefi_config.txt Sat Jun 16 08:07:00 EDT 2018
 // begin
 #ifndef ENGINE_CONFIGURATION_GENERATED_H_
 #define ENGINE_CONFIGURATION_GENERATED_H_
@@ -571,6 +571,7 @@ typedef struct {
 	 */
 	pin_output_mode_e triggerSimulatorPinModes[TRIGGER_SIMULATOR_PIN_COUNT];
 	/**
+	 * Narrow band o2 heater, not used for CJ125. See wboHeaterPin
 	 * offset 368
 	 */
 	brain_pin_e o2heaterPin;
@@ -2387,4 +2388,4 @@ typedef struct {
 
 #endif
 // end
-// this section was generated automatically by ConfigDefinition.jar based on rusefi_config.txt Fri Jun 15 20:43:23 EDT 2018
+// this section was generated automatically by ConfigDefinition.jar based on rusefi_config.txt Sat Jun 16 08:07:00 EDT 2018
diff --git a/firmware/integration/rusefi_config.txt b/firmware/integration/rusefi_config.txt
index 0867a3705d..3e434730c3 100644
--- a/firmware/integration/rusefi_config.txt
+++ b/firmware/integration/rusefi_config.txt
@@ -524,7 +524,7 @@ custom adc_channel_mode_e 4 bits,    U32,   @OFFSET@, [0:1], "Off", "Slow", "Fas
 	brain_pin_e[TRIGGER_SIMULATOR_PIN_COUNT iterate] triggerSimulatorPins;
 	pin_output_mode_e[TRIGGER_SIMULATOR_PIN_COUNT iterate] triggerSimulatorPinModes;
 
-	brain_pin_e o2heaterPin;
+	brain_pin_e o2heaterPin;Narrow band o2 heater, not used for CJ125. See wboHeaterPin
 	pin_output_mode_e o2heaterPinModeTodO;
 
 bit is_enabled_spi_1
diff --git a/firmware/tunerstudio/rusefi.ini b/firmware/tunerstudio/rusefi.ini
index 128e8f6ea4..f510f2455c 100644
--- a/firmware/tunerstudio/rusefi.ini
+++ b/firmware/tunerstudio/rusefi.ini
@@ -63,7 +63,7 @@ enable2ndByteCanID = false
 
 ; see PAGE_0_SIZE in C source code    
 ; CONFIG_DEFINITION_START
-; this section was generated automatically by ConfigDefinition.jar based on rusefi_config.txt Fri Jun 15 20:43:23 EDT 2018
+; this section was generated automatically by ConfigDefinition.jar based on rusefi_config.txt Sat Jun 16 08:07:00 EDT 2018
 
 pageSize            = 20000
 page = 1
@@ -2514,6 +2514,7 @@ cmd_stop_engine              = "w\x00\x99\x00\x00"
 		field = "!ECU reboot needed to apply these settings"
 		field = "ChipSelect pin",						cj125CsPin, {isCJ125Enabled == 1}
 		field = "ChipSelect mode",						cj125CsPinMode, {isCJ125Enabled == 1}
+		field = "!See also 'Controller-SPI setting'"
 		field = "SPI device",							cj125SpiDevice
 		field = "Heater pin",							wboHeaterPin, {isCJ125Enabled == 1}
 		field = "UA input",								cj125ua, {isCJ125Enabled == 1}
diff --git a/firmware/tunerstudio/rusefi.input b/firmware/tunerstudio/rusefi.input
index 5f48fcf398..69ef0dafdc 100644
--- a/firmware/tunerstudio/rusefi.input
+++ b/firmware/tunerstudio/rusefi.input
@@ -1675,6 +1675,7 @@ cmd_stop_engine              = "w\x00\x99\x00\x00"
 		field = "!ECU reboot needed to apply these settings"
 		field = "ChipSelect pin",						cj125CsPin, {isCJ125Enabled == 1}
 		field = "ChipSelect mode",						cj125CsPinMode, {isCJ125Enabled == 1}
+		field = "!See also 'Controller-SPI setting'"
 		field = "SPI device",							cj125SpiDevice
 		field = "Heater pin",							wboHeaterPin, {isCJ125Enabled == 1}
 		field = "UA input",								cj125ua, {isCJ125Enabled == 1}