diff --git a/main/io/URLParser.cpp b/main/io/URLParser.cpp
index 4a50ab1..af679ec 100644
--- a/main/io/URLParser.cpp
+++ b/main/io/URLParser.cpp
@@ -1,5 +1,8 @@
 #include "URLParser.h"
 
+#include <cstdio>   // sscanf (GCC 14 / ESP-IDF 5.5: not included transitively)
+#include <cstring>  // strstr
+
 namespace bell {
 
 #ifdef BELL_DISABLE_REGEX