diff --git a/src/main/java/org/ice4j/attribute/MessageIntegrityAttribute.java b/src/main/java/org/ice4j/attribute/MessageIntegrityAttribute.java
index a963bb94..a1e4907f 100644
--- a/src/main/java/org/ice4j/attribute/MessageIntegrityAttribute.java
+++ b/src/main/java/org/ice4j/attribute/MessageIntegrityAttribute.java
@@ -283,7 +283,7 @@ public byte[] encode(
         char msgType =
             (char) (((content[0] & 0xFF) << 8) | (content[1] & 0xFF));
 
-        if(Message.isRequestType(msgType))
+        if(Message.isRequestType(msgType) || Message.isIndicationType(msgType))
         {
             /* attribute part of a request, use the remote key */
             key = stunStack.getCredentialsManager().getRemoteKey(username,