diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index 6c124116b8..4e2049c4c6 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -2,6 +2,7 @@
 
 #include <algorithm>
 #include <array>
+#include <cassert>
 #include <cmath>
 #include <cstdarg>
 #include <cstdint>