3 files changed, 3 insertions, 3 deletions
diff --git a/shared-bindings/microcontroller/Pin.c b/shared-bindings/microcontroller/Pin.c
index f53949d85..931c0b4c4 100644
--- a/shared-bindings/microcontroller/Pin.c
+++ b/shared-bindings/microcontroller/Pin.c
@@ -36,7 +36,7 @@
 //| class Pin:
 //|     """Identifies an IO pin on the microcontroller."""
 //|
-//|     def __init__(self):
+//|     def __init__(self) -> None:
 //|         """Identifies an IO pin on the microcontroller. They are fixed by the
 //|         hardware so they cannot be constructed on demand. Instead, use
 //|         `board` or `microcontroller.pin` to reference the desired pin."""
diff --git a/shared-bindings/microcontroller/Processor.c b/shared-bindings/microcontroller/Processor.c
index 32ec4f2e7..d9f780f84 100644
--- a/shared-bindings/microcontroller/Processor.c
+++ b/shared-bindings/microcontroller/Processor.c
@@ -44,7 +44,7 @@
 //|        print(microcontroller.cpu.temperature)"""
 //|
 
-//|     def __init__(self):
+//|     def __init__(self) -> None:
 //|         """You cannot create an instance of `microcontroller.Processor`.
 //|         Use `microcontroller.cpu` to access the sole instance available."""
 //|         ...
diff --git a/shared-bindings/microcontroller/RunMode.c b/shared-bindings/microcontroller/RunMode.c
index f133c34b1..38bbb612b 100644
--- a/shared-bindings/microcontroller/RunMode.c
+++ b/shared-bindings/microcontroller/RunMode.c
@@ -29,7 +29,7 @@
 //| class RunMode:
 //|     """run state of the microcontroller"""
 //|
-//|     def __init__(self):
+//|     def __init__(self) -> None:
 //|         """Enum-like class to define the run mode of the microcontroller and
 //|         CircuitPython."""
 //|