1 files changed, 1 insertions, 1 deletions
diff --git a/src/cpl.h b/src/cpl.h
index 72366ee3..c1f505df 100644
--- a/src/cpl.h
+++ b/src/cpl.h
@@ -140,7 +140,7 @@ public:
 		return _content_kind;
 	}
 
-	ContentVersion content_version () const;
+	boost::optional<ContentVersion> content_version () const;
 
 	std::vector<ContentVersion> content_versions () const {
 		return _content_versions;