diff --git a/esphome/components/json/json_util.cpp b/esphome/components/json/json_util.cpp
index 6a4eba78ab..7e88fb6e59 100644
--- a/esphome/components/json/json_util.cpp
+++ b/esphome/components/json/json_util.cpp
@@ -4,6 +4,9 @@
 #ifdef USE_ESP8266
 #include <Esp.h>
 #endif
+#ifdef USE_ESP32
+#include <esp_heap_caps.h>
+#endif
 
 namespace esphome {
 namespace json {