diff --git a/esphome/components/remote_base/aeha_protocol.cpp b/esphome/components/remote_base/aeha_protocol.cpp
index 6cb08cdfddd..3b926e79815 100644
--- a/esphome/components/remote_base/aeha_protocol.cpp
+++ b/esphome/components/remote_base/aeha_protocol.cpp
@@ -85,7 +85,7 @@ optional<AEHAData> AEHAProtocol::decode(RemoteReceiveData src) {
 std::string AEHAProtocol::format_data_(const std::vector<uint8_t> &data) {
   std::string out;
   for (uint8_t byte : data) {
-    char buf[8];  // "0x%02X," = 6 chars + null + margin
+    char buf[8];  // "0x%02X," = 5 chars + null + margin
     snprintf(buf, sizeof(buf), "0x%02X,", byte);
     out += buf;
   }