https://github.com/openMSX/openMSX/pull/1445
https://bugs.gentoo.org/868726

diff --git a/src/file/FileBase.hh b/src/file/FileBase.hh
index ec17fb641..d7397f908 100644
--- a/src/file/FileBase.hh
+++ b/src/file/FileBase.hh
@@ -4,6 +4,7 @@
 #include "MemBuffer.hh"
 #include "span.hh"
 #include <cstdint>
+#include <ctime>
 #include <string>

 namespace openmsx {