diff --git a/src/macro/MacroDriver.hh b/src/macro/MacroDriver.hh
index 4c285be72e65145a66675a417424d592c403a8f1..43f468fd07a42fbae7ecc96b7dd02e26c9457501 100644
--- a/src/macro/MacroDriver.hh
+++ b/src/macro/MacroDriver.hh
@@ -159,7 +159,7 @@ private:
   set<const MacroValue *> values;
 
   // The map defining an environment
-  typedef map<string, const MacroValue *> env_t;
+  using env_t = map<string, const MacroValue *>;
 
   //! Environment: maps macro variables to their values
   env_t env;