From 46d4c4bf3d5d0cde83350cf35c0f8313d0c2ac90 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Wed, 14 Jan 2026 19:36:51 -1000
Subject: [PATCH] limit scope

---
 esphome/core/hash_base.h | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/esphome/core/hash_base.h b/esphome/core/hash_base.h
index 5b62fd0d17e..e549c3a5159 100644
--- a/esphome/core/hash_base.h
+++ b/esphome/core/hash_base.h
@@ -44,9 +44,12 @@ class HashBase {
   virtual size_t get_size() const = 0;
 
  protected:
-  // 32-byte alignment required for ESP32-S2/S3 hardware SHA DMA operations.
-  // This also sets the class alignment to 32, ensuring derived objects are properly aligned.
-  alignas(32) uint8_t digest_[32];  // Storage sized for max(MD5=16, SHA256=32) bytes
+// ESP32-S2/S3 hardware SHA uses DMA that requires 32-byte aligned buffers.
+// Other platforms either don't have hardware SHA or don't require alignment.
+#if defined(USE_ESP32_VARIANT_ESP32S2) || defined(USE_ESP32_VARIANT_ESP32S3)
+  alignas(32)
+#endif
+      uint8_t digest_[32];  // Storage sized for max(MD5=16, SHA256=32) bytes
 };
 
 }  // namespace esphome