diff --git a/src/str.hpp b/src/str.hpp
index 192d8673..22639f23 100644
--- a/src/str.hpp
+++ b/src/str.hpp
@@ -101,6 +101,10 @@ namespace str
   startswith(const char *str,
              const char *prefix);
 
+  bool
+  startswith(const char                *str,
+             nonstd::span<const char*>  prefixes);
+
   bool
   startswith(const char                     *str,
              nonstd::span<std::string_view>  prefixes);