diff --git a/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XmppTcpTransportModule.java b/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XmppTcpTransportModule.java
index 965ddb192..c944d5440 100644
--- a/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XmppTcpTransportModule.java
+++ b/smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XmppTcpTransportModule.java
@@ -498,9 +498,9 @@ public class XmppTcpTransportModule extends ModularXmppClientToServerConnectionM
                     pendingInputFilterData = false;
                 }
 
-                // We have successfully read something. It is now possible that a filter is now also able to write
-                // additional data (for example SSLEngine).
                 if (pendingWriteInterestAfterRead) {
+                    // We have successfully read something and someone announced a write interest after a read. It is
+                    // now possible that a filter is now also able to write additional data (for example SSLEngine).
                     pendingWriteInterestAfterRead = false;
                     newInterestedOps |= SelectionKey.OP_WRITE;
                 }