--- grive2-0.5.1/libgrive/src/base/Syncer.hh.include	2019-11-13 07:05:31.000000000 +0900
+++ grive2-0.5.1/libgrive/src/base/Syncer.hh	2022-09-07 23:44:45.555093074 +0900
@@ -24,6 +24,7 @@
 #include <string>
 #include <vector>
 #include <iosfwd>
+#include <memory>
 
 namespace gr {