diff --git a/src/whiteboard/side_actions.cpp b/src/whiteboard/side_actions.cpp
index 9096a2f7e47..014544a0679 100644
--- a/src/whiteboard/side_actions.cpp
+++ b/src/whiteboard/side_actions.cpp
@@ -62,6 +62,7 @@ side_actions::side_actions()
 	, team_index_(0)
 	, team_index_defined_(false)
 	, gold_spent_(0)
+	, hidden_(false)
 {
 }