diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 0a19e79bc..75032bf90 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -628,7 +628,7 @@ void AutoDelete::cancel()
     del = false;
 }
 
-void AutoDelete::reset(const Path & p, bool recursive = true) {
+void AutoDelete::reset(const Path & p, bool recursive) {
     path = p;
     this->recursive = recursive;
     del = true;