diff --git a/src/str.hpp b/src/str.hpp
index ddaa2f66..478e9f8a 100644
--- a/src/str.hpp
+++ b/src/str.hpp
@@ -87,6 +87,10 @@ namespace str
   startswith(const std::string &str_,
              const std::string &prefix_);
 
+  bool
+  startswith(const std::string      &str_,
+             const std::string_view  prefix_);
+
   bool
   startswith(const char *str,
              const char *prefix);