diff --git a/esphome/components/toshiba/toshiba.cpp b/esphome/components/toshiba/toshiba.cpp
index 5d824b4be8..ef96caf238 100644
--- a/esphome/components/toshiba/toshiba.cpp
+++ b/esphome/components/toshiba/toshiba.cpp
@@ -405,7 +405,7 @@ void ToshibaClimate::setup() {
   this->swing_modes_ = this->toshiba_swing_modes_();
 
   // Ensure swing mode is always initialized to a valid value
-  if (this->swing_modes_.empty() || !this->swing_modes_.contains(this->swing_mode)) {
+  if (this->swing_modes_.empty() || (this->swing_modes_.count(this->swing_mode) == 0)) {
     // No swing support for this model or current swing mode not supported, reset to OFF
     this->swing_mode = climate::CLIMATE_SWING_OFF;
   }