diff --git a/libs/wire-api/src/Wire/API/MLS/CommitBundle.hs b/libs/wire-api/src/Wire/API/MLS/CommitBundle.hs
index f8281968196..1ca590e04ee 100644
--- a/libs/wire-api/src/Wire/API/MLS/CommitBundle.hs
+++ b/libs/wire-api/src/Wire/API/MLS/CommitBundle.hs
@@ -27,7 +27,7 @@ import Wire.API.MLS.Serialisation
 import Wire.API.MLS.Welcome
 
 data CommitBundle = CommitBundle
-  { commitMsg :: RawMLS Message, -- TODO: change this type to Commit
+  { commitMsg :: RawMLS Message,
     welcome :: Maybe (RawMLS Welcome),
     groupInfo :: RawMLS GroupInfo
   }
diff --git a/services/galley/src/Galley/API/MLS/Message.hs b/services/galley/src/Galley/API/MLS/Message.hs
index d1c94f17ce4..99f117cd48a 100644
--- a/services/galley/src/Galley/API/MLS/Message.hs
+++ b/services/galley/src/Galley/API/MLS/Message.hs
@@ -72,10 +72,10 @@ import Wire.API.MLS.Serialisation
 import Wire.API.MLS.SubConversation
 
 -- TODO:
--- [ ] replace commit message in CommitBundle with a Commit object
 -- [ ] restore deleted MLS unit tests
 -- [ ] pass groupId and epoch to processProposal instead of the whole IncomingMessage
 -- [ ] remove LWT in planMLSClientRemoval
+-- [ ] restore unsupported proposal integration test
 
 -- FUTUREWORK
 -- - Check that the capabilities of a leaf node in an add proposal contains all
@@ -354,7 +354,7 @@ postMLSMessageToLocalConv qusr c con msg convOrSubId = do
       FramedContentCommit _commit -> throwS @'MLSUnsupportedMessage
       FramedContentApplicationData _ -> throwS @'MLSUnsupportedMessage
       FramedContentProposal prop ->
-        processProposal qusr lConvOrSub msg pub prop $> mempty
+        processProposal qusr lConvOrSub msg.groupId msg.epoch pub prop $> mempty
     IncomingMessageContentPrivate -> pure mempty
 
   let cm = membersConvOrSub (tUnqualified lConvOrSub)
diff --git a/services/galley/src/Galley/API/MLS/Proposal.hs b/services/galley/src/Galley/API/MLS/Proposal.hs
index 617d95c8fad..a838d96ea89 100644
--- a/services/galley/src/Galley/API/MLS/Proposal.hs
+++ b/services/galley/src/Galley/API/MLS/Proposal.hs
@@ -245,16 +245,17 @@ processProposal ::
   ) =>
   Qualified UserId ->
   Local ConvOrSubConv ->
-  IncomingMessage -> -- TODO: just pass header?
+  GroupId ->
+  Epoch ->
   IncomingPublicMessageContent ->
   RawMLS Proposal ->
   Sem r ()
-processProposal qusr lConvOrSub msg pub prop = do
+processProposal qusr lConvOrSub groupId epoch pub prop = do
   let mlsMeta = mlsMetaConvOrSub (tUnqualified lConvOrSub)
   -- Check if the epoch number matches that of a conversation
-  unless (msg.epoch == cnvmlsEpoch mlsMeta) $ throwS @'MLSStaleMessage
+  unless (epoch == cnvmlsEpoch mlsMeta) $ throwS @'MLSStaleMessage
   -- Check if the group ID matches that of a conversation
-  unless (msg.groupId == cnvmlsGroupId mlsMeta) $ throwS @'ConvNotFound
+  unless (groupId == cnvmlsGroupId mlsMeta) $ throwS @'ConvNotFound
   let suiteTag = cnvmlsCipherSuite mlsMeta
 
   -- FUTUREWORK: validate the member's conversation role
@@ -262,7 +263,7 @@ processProposal qusr lConvOrSub msg pub prop = do
   checkProposal mlsMeta im prop.value
   when (isExternal pub.sender) $ checkExternalProposalUser qusr prop.value
   let propRef = authContentRef suiteTag (incomingMessageAuthenticatedContent pub)
-  storeProposal msg.groupId msg.epoch propRef ProposalOriginClient prop
+  storeProposal groupId epoch propRef ProposalOriginClient prop
 
 getKeyPackageIdentity ::
   Member (ErrorS 'MLSUnsupportedProposal) r =>