diff --git a/firmware/main/clock_core.cpp b/firmware/main/clock_core.cpp
index f543fa0..03946fd 100644
--- a/firmware/main/clock_core.cpp
+++ b/firmware/main/clock_core.cpp
@@ -174,7 +174,7 @@ void run(const char* wifi_ssid, const char* wifi_password)
     {
       char time_buf[64];
       std::time_t time_now;
-      std::tm time_info;
+      std::tm time_info{};
       std::time(&time_now);
       localtime_r(&time_now, &time_info);