diff --git a/esphome/components/fan/fan.cpp b/esphome/components/fan/fan.cpp
index d37825a651..0dfe63b6c9 100644
--- a/esphome/components/fan/fan.cpp
+++ b/esphome/components/fan/fan.cpp
@@ -65,7 +65,7 @@ void FanCall::validate_() {
   auto traits = this->parent_.get_traits();
 
   if (this->speed_.has_value()) {
-    this->speed_ = clamp(*this->speed_, 1, traits.supported_speed_count());
+    this->speed_ = clamp(*this->speed_, 1, static_cast<int>(traits.supported_speed_count()));
 
     // https://developers.home-assistant.io/docs/core/entity/fan/#preset-modes
     // "Manually setting a speed must disable any set preset mode"