diff --git a/lib/matchcompiler.h b/lib/matchcompiler.h
index 230453362a1..e530276c1f5 100644
--- a/lib/matchcompiler.h
+++ b/lib/matchcompiler.h
@@ -27,7 +27,7 @@ namespace MatchCompiler {
     template<unsigned int n>
     class ConstString {
     public:
-        typedef const char(&StringRef)[n];
+        using StringRef = const char (&)[n];
         explicit ConstString(StringRef s)
             : _s(s) {}
 
@@ -46,7 +46,7 @@ namespace MatchCompiler {
     }
 
     template<>
-    inline bool equalN<0>(const char[], const char[])
+    inline bool equalN<0>(const char /*s1*/[], const char /*s2*/[])
     {
         return true;
     }