diff --git a/boards/auterion/fmu-v6x/init/rc.board_defaults b/boards/auterion/fmu-v6x/init/rc.board_defaults
index 1cde986e44..5929e30471 100644
--- a/boards/auterion/fmu-v6x/init/rc.board_defaults
+++ b/boards/auterion/fmu-v6x/init/rc.board_defaults
@@ -22,7 +22,7 @@ netman update_default -i eth0
 
 safety_button start
 
-# GPIO Expander driver on external I2C3
+ GPIO Expander driver on external I2C3
 if ver hwbasecmp 009 010 011
 then
 	# No USB
diff --git a/boards/auterion/fmu-v6x/src/init.cpp b/boards/auterion/fmu-v6x/src/init.cpp
index 6fd494560a..e22130e7c1 100644
--- a/boards/auterion/fmu-v6x/src/init.cpp
+++ b/boards/auterion/fmu-v6x/src/init.cpp
@@ -282,9 +282,17 @@ __EXPORT int board_app_initialize(uintptr_t arg)
 	}
 
 #  endif /* CONFIG_MMCSD */
-
 	ret = mcp23009_register_gpios(3, 0x25);
-	ret |= mcp23017_register_gpios(2, 0x27, 0, 0x0000);
+
+	if (ret != OK) {
+		led_on(LED_RED);
+		return ret;
+	}
+
+	int offset = 8; // This is the offset for the naming of the instatiated GPIO-DEVICES.
+	uint16_t pin_types = 0x0000;// Set pin type. Set bit to 1 to mark pin as INPUT, set to 0 to mark as OUTPUT
+
+	ret = mcp23017_register_gpios(2, 0x27, offset, pin_types);
 
 	if (ret != OK) {
 		led_on(LED_RED);
@@ -295,3 +303,5 @@ __EXPORT int board_app_initialize(uintptr_t arg)
 
 	return OK;
 }
+
+