diff --git a/src/DatabasePrint.cxx b/src/DatabasePrint.cxx
index 7b5975275..ef7ba825b 100644
--- a/src/DatabasePrint.cxx
+++ b/src/DatabasePrint.cxx
@@ -46,7 +46,9 @@ PrintDirectoryFull(Client &client, const Directory &directory)
 {
 	if (!directory.IsRoot()) {
 		client_printf(client, "directory: %s\n", directory.GetPath());
-		time_print(client, "Last-Modified", directory.mtime);
+
+		if (directory.mtime > 0)
+			time_print(client, "Last-Modified", directory.mtime);
 	}
 
 	return true;