From 511095d3da567445695364db4305dc53ef5667cd Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Wed, 16 Sep 2026 01:21:58 -0500
Subject: [PATCH] [scd4x] Use a user provided default constructor for
 PerformForcedCalibrationAction (#19176)

---
 esphome/components/scd4x/automation.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/esphome/components/scd4x/automation.h b/esphome/components/scd4x/automation.h
index 4746c0c879c..e0cc04e2cb7 100644
--- a/esphome/components/scd4x/automation.h
+++ b/esphome/components/scd4x/automation.h
@@ -9,6 +9,10 @@ namespace esphome::scd4x {
 template<typename... Ts>
 class PerformForcedCalibrationAction final : public Action<Ts...>, public Parented<SCD4XComponent> {
  public:
+  // User provided, not "= default": `new(p) PerformForcedCalibrationAction()` would zero-fill .bss that is already
+  // zero.
+  PerformForcedCalibrationAction() {}
+
   void play(const Ts &...x) override {
     if (this->value_.has_value()) {
       this->parent_->perform_forced_calibration(this->value_.value(x...));