diff --git a/src/core/random_func.hpp b/src/core/random_func.hpp
--- a/src/core/random_func.hpp
+++ b/src/core/random_func.hpp
@@ -159,4 +159,6 @@ inline bool Chance16R(const uint a, cons
 }
 #endif /* RANDOM_DEBUG */
 
+void RandomBytesWithFallback(std::span<uint8_t> buf);
+
 #endif /* RANDOM_FUNC_HPP */