diff --git a/src/modules/chips/stm32f303/stm32f303.zig b/src/modules/chips/stm32f303/stm32f303.zig
index e9cc706..bb92d41 100644
--- a/src/modules/chips/stm32f303/stm32f303.zig
+++ b/src/modules/chips/stm32f303/stm32f303.zig
@@ -103,7 +103,6 @@ pub const gpio = struct {
     }
 
     pub fn write(comptime pin: type, state: micro.gpio.State) void {
-        _ = pin;
         switch (state) {
             .low => setRegField(pin.gpio_port.BRR, "BR" ++ pin.suffix, 1),
             .high => setRegField(pin.gpio_port.BSRR, "BS" ++ pin.suffix, 1),
diff --git a/src/modules/chips/stm32f407/stm32f407.zig b/src/modules/chips/stm32f407/stm32f407.zig
index c07582c..7c3566c 100644
--- a/src/modules/chips/stm32f407/stm32f407.zig
+++ b/src/modules/chips/stm32f407/stm32f407.zig
@@ -126,7 +126,6 @@ pub const gpio = struct {
     }
 
     pub fn write(comptime pin: type, state: micro.gpio.State) void {
-        _ = pin;
         switch (state) {
             .low => setRegField(pin.gpio_port.BSRR, "BR" ++ pin.suffix, 1),
             .high => setRegField(pin.gpio_port.BSRR, "BS" ++ pin.suffix, 1),
diff --git a/src/modules/chips/stm32f429/stm32f429.zig b/src/modules/chips/stm32f429/stm32f429.zig
index d40d92b..3fa26c1 100644
--- a/src/modules/chips/stm32f429/stm32f429.zig
+++ b/src/modules/chips/stm32f429/stm32f429.zig
@@ -86,7 +86,6 @@ pub const gpio = struct {
     }
 
     pub fn write(comptime pin: type, state: micro.gpio.State) void {
-        _ = pin;
         switch (state) {
             .low => setRegField(pin.gpio_port.BSRR, "BR" ++ pin.suffix, 1),
             .high => setRegField(pin.gpio_port.BSRR, "BS" ++ pin.suffix, 1),