diff --git a/components/net/sf/briar/protocol/SigningConsumer.java b/components/net/sf/briar/protocol/SigningConsumer.java
index d2739f6bd..3b8ee7edc 100644
--- a/components/net/sf/briar/protocol/SigningConsumer.java
+++ b/components/net/sf/briar/protocol/SigningConsumer.java
@@ -6,6 +6,8 @@ import java.security.SignatureException;
 
 import net.sf.briar.api.serial.Consumer;
 
+// FIXME: This class is no longer used - remove it?
+
 /** A consumer that passes its input through a signature. */
 class SigningConsumer implements Consumer {
 
diff --git a/components/net/sf/briar/protocol/SigningDigestingOutputStream.java b/components/net/sf/briar/protocol/SigningDigestingOutputStream.java
index 6d72dc905..5709a5238 100644
--- a/components/net/sf/briar/protocol/SigningDigestingOutputStream.java
+++ b/components/net/sf/briar/protocol/SigningDigestingOutputStream.java
@@ -7,6 +7,8 @@ import java.security.MessageDigest;
 import java.security.Signature;
 import java.security.SignatureException;
 
+// FIXME: This class is no longer used - remove it?
+
 /**
  * An output stream that passes its output through a signature and a message
  * digest.