diff --git a/CHANGELOG.md b/CHANGELOG.md
index 05f431088626..15b7706a733c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,10 +38,11 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased Provenance]
 
-### Improvments
-
+### Improvements
+* (x/auth/tx) [#617](https://github.com/provenance-io/cosmos-sdk/pull/617) Provenance: For WebAuthn signatures, the public key can be derived in from signature itself,
+ and has no correlation to the address itself(as can be the case in normal cosmos signatures flows),
+ the signature is compared against the pubkey registered while webauthn key registration, Additionally this doesn't really seem to be used anywhere else and does not affect normal cosmos verification flows.
 * [618](https://github.com/provenance-io/cosmos-sdk/pull/618) Provenance: Remove the fee handler (now using the post handler).
-
 ---
 
 ## [v0.50.14-pio-1](https://github.com/provenance-io/cosmos-sdk/releases/tag/v0.50.14-pio-1) - 2025-07-09
diff --git a/x/auth/tx/adapter.go b/x/auth/tx/adapter.go
index 5ce5c8a91981..ab88bbdc89e1 100644
--- a/x/auth/tx/adapter.go
+++ b/x/auth/tx/adapter.go
@@ -59,10 +59,15 @@ func (w *wrapper) GetSigningTxData() txsigning.TxData {
 		modeInfo := &txv1beta1.ModeInfo{}
 		adaptModeInfo(signerInfo.ModeInfo, modeInfo)
 		txSignerInfo := &txv1beta1.SignerInfo{
-			PublicKey: &anypb.Any{
-				TypeUrl: signerInfo.PublicKey.TypeUrl,
-				Value:   signerInfo.PublicKey.Value,
-			},
+			PublicKey: func() *anypb.Any {
+				if signerInfo.PublicKey == nil {
+					return nil
+				}
+				return &anypb.Any{
+					TypeUrl: signerInfo.PublicKey.TypeUrl,
+					Value:   signerInfo.PublicKey.Value,
+				}
+			}(),
 			Sequence: signerInfo.Sequence,
 			ModeInfo: modeInfo,
 		}