1 files changed, 2 insertions, 0 deletions
diff --git a/src/lib/util.h b/src/lib/util.h
index a011da335..933618d6c 100644
--- a/src/lib/util.h
+++ b/src/lib/util.h
@@ -63,6 +63,8 @@ namespace dcp {
 #define CLOSED_CAPTION_LINES 3
 /** Maximum line length of closed caption viewers */
 #define CLOSED_CAPTION_LENGTH 30
+/** Validity period of certificate chains (in days) */
+#define CERTIFICATE_VALIDITY_PERIOD (10 * 365)
 
 extern std::string program_name;
 extern bool is_batch_converter;