diff --git a/keystore2/src/globals.rs b/keystore2/src/globals.rs
index 39d6f9c..0e8892b 100644
--- a/keystore2/src/globals.rs
+++ b/keystore2/src/globals.rs
@@ -271,17 +271,8 @@
     // If the KeyMint device is back-level, use a wrapper that intercepts and
     // emulates things that are not supported by the hardware.
     let keymint = match hal_version {
-        Some(300) => {
-            // Current KeyMint version: use as-is as v3 Keymint is current version
-            log::info!(
-                "KeyMint device is current version ({:?}) for security level: {:?}",
-                hal_version,
-                security_level
-            );
-            keymint
-        }
-        Some(200) => {
-            // Previous KeyMint version: use as-is as we don't have any software emulation of v3-specific KeyMint features.
+        Some(400) | Some(300) | Some(200) => {
+            // KeyMint v2+: use as-is (we don't have any software emulation of v3 or v4-specific KeyMint features).
             log::info!(
                 "KeyMint device is current version ({:?}) for security level: {:?}",
                 hal_version,
diff --git a/keystore2/src/km_compat.rs b/keystore2/src/km_compat.rs
index 5e3bdfa..95e9294 100644
--- a/keystore2/src/km_compat.rs
+++ b/keystore2/src/km_compat.rs
@@ -214,6 +214,12 @@
     fn sendRootOfTrust(&self, root_of_trust: &[u8]) -> binder::Result<()> {
         self.real.sendRootOfTrust(root_of_trust)
     }
+    fn setAdditionalAttestationInfo(
+        &self,
+        additional_attestation_info: &[KeyParameter],
+    ) -> binder::Result<()> {
+        self.real.setAdditionalAttestationInfo(additional_attestation_info)
+    }
 
     // For methods that emit keyblobs, check whether the underlying real device
     // supports the relevant parameters, and forward to the appropriate device.
diff --git a/keystore2/src/km_compat/km_compat.cpp b/keystore2/src/km_compat/km_compat.cpp
index e9ff1ff..7a6ef4a 100644
--- a/keystore2/src/km_compat/km_compat.cpp
+++ b/keystore2/src/km_compat/km_compat.cpp
@@ -839,6 +839,11 @@
     return convertErrorCode(KMV1::ErrorCode::UNIMPLEMENTED);
 }
 
+ScopedAStatus KeyMintDevice::setAdditionalAttestationInfo(
+    const std::vector<KeyParameter>& /* additionalAttestationInfo */) {
+    return convertErrorCode(KMV1::ErrorCode::UNIMPLEMENTED);
+}
+
 ScopedAStatus KeyMintOperation::updateAad(const std::vector<uint8_t>& input,
                                           const std::optional<HardwareAuthToken>& optAuthToken,
                                           const std::optional<TimeStampToken>& optTimeStampToken) {
diff --git a/keystore2/src/km_compat/km_compat.h b/keystore2/src/km_compat/km_compat.h
index c4bcdaa..71f7fbe 100644
--- a/keystore2/src/km_compat/km_compat.h
+++ b/keystore2/src/km_compat/km_compat.h
@@ -147,6 +147,9 @@
                                  std::vector<uint8_t>* rootOfTrust);
     ScopedAStatus sendRootOfTrust(const std::vector<uint8_t>& rootOfTrust);
 
+    ScopedAStatus
+    setAdditionalAttestationInfo(const std::vector<KeyParameter>& additionalAttestationInfo);
+
     // These are public to allow testing code to use them directly.
     // This class should not be used publicly anyway.
     std::variant<std::vector<Certificate>, KMV1_ErrorCode>
diff --git a/keystore2/src/km_compat/km_compat_type_conversion.h b/keystore2/src/km_compat/km_compat_type_conversion.h
index 5db7e3d..d6a2dcc 100644
--- a/keystore2/src/km_compat/km_compat_type_conversion.h
+++ b/keystore2/src/km_compat/km_compat_type_conversion.h
@@ -750,8 +750,12 @@
     case KMV1::Tag::CERTIFICATE_SUBJECT:
     case KMV1::Tag::CERTIFICATE_NOT_BEFORE:
     case KMV1::Tag::CERTIFICATE_NOT_AFTER:
+        // These tags do not exist in KM < KeyMint 1.
+        break;
     case KMV1::Tag::ATTESTATION_ID_SECOND_IMEI:
-        // These tags do not exist in KM < KeyMint 1.0.
+        // This tag doesn't exist in KM < KeyMint 3.
+    case KMV1::Tag::MODULE_HASH:
+        // This tag doesn't exist in KM < KeyMint 4.
         break;
     case KMV1::Tag::MAX_BOOT_LEVEL:
         // Does not exist in API level 30 or below.