diff --git a/briar-core/src/main/java/org/briarproject/briar/socialbackup/DarkCrystal.java b/briar-core/src/main/java/org/briarproject/briar/socialbackup/DarkCrystal.java
index da991acbe..52d4a05fe 100644
--- a/briar-core/src/main/java/org/briarproject/briar/socialbackup/DarkCrystal.java
+++ b/briar-core/src/main/java/org/briarproject/briar/socialbackup/DarkCrystal.java
@@ -8,6 +8,7 @@ import java.security.GeneralSecurityException;
 import java.util.List;
 
 @NotNullByDefault
+public
 interface DarkCrystal {
 
 	List<Shard> createShards(SecretKey secret, int shards, int threshold);