diff --git a/.ci/api-current.txt b/.ci/api-current.txt
index 10374f09e3..64e351610e 100644
--- a/.ci/api-current.txt
+++ b/.ci/api-current.txt
@@ -5398,10 +5398,6 @@ public interface net.corda.core.schemas.QueryableState extends net.corda.core.co
 ##
 public interface net.corda.core.schemas.StatePersistable
 ##
-public interface net.corda.core.serialization.CheckpointCustomSerializer
-  public abstract OBJ fromProxy(PROXY)
-  public abstract PROXY toProxy(OBJ)
-##
 public interface net.corda.core.serialization.ClassWhitelist
   public abstract boolean hasListed(Class<?>)
 ##