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-rw-r--r--libs/ardour/ardour/automation_event.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libs/ardour/ardour/automation_event.h b/libs/ardour/ardour/automation_event.h
index 007bad7259..5a9792c11d 100644
--- a/libs/ardour/ardour/automation_event.h
+++ b/libs/ardour/ardour/automation_event.h
@@ -199,7 +199,7 @@ class AutomationList : public PBD::StatefulDestructible
std::pair<AutomationList::iterator,AutomationList::iterator> range;
};
- LookupCache lookup_cache;
+ mutable LookupCache lookup_cache;
AutoState _state;
AutoStyle _style;