diff --git a/components/net/sf/briar/protocol/SigningConsumer.java b/components/net/sf/briar/protocol/SigningConsumer.java
index d2739f6bd8810691bf2b3726c21f61da81c168c9..3b8ee7edc98cd8fd643a94ffd1e1fe20e8af7aeb 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 6d72dc905b8a49f95f0c7cdc0da6830c8a85491b..5709a523891805a903ad5ad7d25fcee49d10f3e5 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.