diff --git a/src/regex.hh b/src/regex.hh
index b88b1ba4..ad435b6f 100644
--- a/src/regex.hh
+++ b/src/regex.hh
@@ -20,7 +20,7 @@ struct regex_error : runtime_error
 using RegexBase = boost::basic_regex<wchar_t, boost::c_regex_traits<wchar_t>>;
 
 // Regex that keeps track of its string representation
-class Regex : RegexBase
+class Regex : public RegexBase
 {
 public:
     Regex() = default;