diff --git a/esphome/components/ota/ota_backend.h b/esphome/components/ota/ota_backend.h
index cc6ef365be..bcefcf4f0d 100644
--- a/esphome/components/ota/ota_backend.h
+++ b/esphome/components/ota/ota_backend.h
@@ -75,7 +75,7 @@ class OTAComponent : public Component {
    */
   void notify_state_deferred_(OTAState state, float progress, uint8_t error) {
     // Pack state, error, and progress into a single uint32_t so the lambda
-    // captures only [this, packed] (8 bytes) — fits in std::function SBO.
+    // captures only [this, packed] (8 bytes) — intended to fit in std::function SBO on supported toolchains.
     // Layout: [state:8][error:8][progress_fixed:16] where progress is 0–10000 (0.01% resolution)
     uint32_t packed = (static_cast<uint32_t>(state) << 24) | (static_cast<uint32_t>(error) << 16) |
                       static_cast<uint16_t>(progress * 100.0f);