crimson: add missing include

Signed-off-by: Max Kellermann <max.kellermann@ionos.com>

diff --git a/src/crimson/osd/scrub/scrub_machine.h b/src/crimson/osd/scrub/scrub_machine.h
index 7472dd62dddb39080751c8cada961e39ef8b5a5f..eaf200819769a2185e78dc5a4ae3be8a4ee60868 100644 (file)
--- a/src/crimson/osd/scrub/scrub_machine.h
+++ b/src/crimson/osd/scrub/scrub_machine.h
@@ -6,6 +6,7 @@
 #include <string>
 #include <ranges>
 
+#include <boost/optional.hpp>
 #include <boost/statechart/custom_reaction.hpp>
 #include <boost/statechart/deferral.hpp>
 #include <boost/statechart/event.hpp>