diff --git a/esphome/components/prometheus/prometheus_handler.h b/esphome/components/prometheus/prometheus_handler.h
index f416ecf246..0ae2856ce4 100644
--- a/esphome/components/prometheus/prometheus_handler.h
+++ b/esphome/components/prometheus/prometheus_handler.h
@@ -5,6 +5,7 @@
 #include <map>
 #include <utility>
 
+#include "esphome/core/entity_base.h"
 #include "esphome/components/web_server_base/web_server_base.h"
 #include "esphome/core/controller.h"
 #include "esphome/core/component.h"