diff --git a/base/base/logger_useful.h b/base/base/logger_useful.h
index 1237c6bd47c..ad7d6583f5e 100644
--- a/base/base/logger_useful.h
+++ b/base/base/logger_useful.h
@@ -12,6 +12,8 @@ namespace
 {
     template <typename... Ts> constexpr size_t numArgs(Ts &&...) { return sizeof...(Ts); }
     template <typename T, typename... Ts> constexpr auto firstArg(T && x, Ts &&...) { return std::forward<T>(x); }
+    /// For implicit conversion of fmt::basic_runtime<> to char* for std::string ctor
+    template <typename T, typename... Ts> constexpr auto firstArg(fmt::basic_runtime<T> && data, Ts &&...) { return data.str.data(); }
 }