diff --git a/CHANGELOG.md b/CHANGELOG.md
index a250b2a84f..a9e177d7da 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@ This release will bump the Realm file format 24. Opening a file with an older fo
 * Inserting the same typed link to the same key in a dictionary more than once would incorrectly create multiple backlinks to the object. This did not appear to cause any crashes later, but would have affecting explicit backlink count queries (eg: `...@links.@count`) and possibly notifications (Core Issue [realm/realm-core#7676](https://github.com/realm/realm-core/issues/7676) since v1.16.0).
 * [Sync] Automatic client reset recovery would crash when recovering AddInteger instructions on a Mixed property if its type was changed to non-integer (Core issue [realm/realm-core#7683](https://github.com/realm/realm-core/pull/7683), since v0.11.0).
 * [Sync] Typos [SubscriptionSetState.SUPERSEDED], [SyncTimeoutOptions.pingKeepalivePeriod] and [SyncTimeoutOptions.pongKeepalivePeriod]. (Issue [#1754](https://github.com/realm/realm-kotlin/pull/1754)
+* [Sync] Fatal sync exceptions are now thrown as `UnrecoverableSyncException`. (Issue [#1767](https://github.com/realm/realm-kotlin/issues/1767) [RKOTLIN-1096](https://jira.mongodb.org/browse/RKOTLIN-1096)).
 
 ### Compatibility
 * File format: Generates Realms with file format v24 (reads and upgrades file format v10 or later).
diff --git a/packages/library-sync/src/commonMain/kotlin/io/realm/kotlin/mongodb/internal/RealmSyncUtils.kt b/packages/library-sync/src/commonMain/kotlin/io/realm/kotlin/mongodb/internal/RealmSyncUtils.kt
index 73fb222306..8985b87757 100644
--- a/packages/library-sync/src/commonMain/kotlin/io/realm/kotlin/mongodb/internal/RealmSyncUtils.kt
+++ b/packages/library-sync/src/commonMain/kotlin/io/realm/kotlin/mongodb/internal/RealmSyncUtils.kt
@@ -78,26 +78,27 @@ internal fun <T, R> channelResultCallback(
 internal fun convertSyncError(syncError: SyncError): SyncException {
     val errorCode = syncError.errorCode
     val message = createMessageFromSyncError(errorCode)
-    return when (errorCode.errorCode) {
-        ErrorCode.RLM_ERR_WRONG_SYNC_TYPE -> WrongSyncTypeException(message)
+    return if (syncError.isFatal) {
+        // An unrecoverable exception happened
+        UnrecoverableSyncException(message)
+    } else {
+        when (errorCode.errorCode) {
+            ErrorCode.RLM_ERR_WRONG_SYNC_TYPE -> WrongSyncTypeException(message)
 
-        ErrorCode.RLM_ERR_INVALID_SUBSCRIPTION_QUERY -> {
-            // Flexible Sync Query was rejected by the server
-            BadFlexibleSyncQueryException(message)
-        }
-        ErrorCode.RLM_ERR_SYNC_COMPENSATING_WRITE -> CompensatingWriteException(message, syncError.compensatingWrites)
+            ErrorCode.RLM_ERR_INVALID_SUBSCRIPTION_QUERY -> {
+                // Flexible Sync Query was rejected by the server
+                BadFlexibleSyncQueryException(message)
+            }
 
-        ErrorCode.RLM_ERR_SYNC_PROTOCOL_INVARIANT_FAILED,
-        ErrorCode.RLM_ERR_SYNC_PROTOCOL_NEGOTIATION_FAILED,
-        ErrorCode.RLM_ERR_SYNC_PERMISSION_DENIED -> {
-            // Permission denied errors should be unrecoverable according to Core, i.e. the
-            // client will disconnect sync and transition to the "inactive" state
-            UnrecoverableSyncException(message)
-        }
-        else -> {
-            // An error happened we are not sure how to handle. Just report as a generic
-            // SyncException.
-            SyncException(message)
+            ErrorCode.RLM_ERR_SYNC_COMPENSATING_WRITE -> CompensatingWriteException(
+                message,
+                syncError.compensatingWrites
+            )
+            else -> {
+                // An error happened we are not sure how to handle. Just report as a generic
+                // SyncException.
+                SyncException(message)
+            }
         }
     }
 }
diff --git a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SyncedRealmTests.kt b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SyncedRealmTests.kt
index 51f3c65f3a..b2ff132e1e 100644
--- a/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SyncedRealmTests.kt
+++ b/packages/test-sync/src/commonTest/kotlin/io/realm/kotlin/test/mongodb/common/SyncedRealmTests.kt
@@ -36,7 +36,6 @@ import io.realm.kotlin.mongodb.App
 import io.realm.kotlin.mongodb.User
 import io.realm.kotlin.mongodb.exceptions.DownloadingRealmTimeOutException
 import io.realm.kotlin.mongodb.exceptions.SyncException
-import io.realm.kotlin.mongodb.exceptions.UnrecoverableSyncException
 import io.realm.kotlin.mongodb.subscriptions
 import io.realm.kotlin.mongodb.sync.InitialSubscriptionsCallback
 import io.realm.kotlin.mongodb.sync.SubscriptionSetState
@@ -336,13 +335,12 @@ class SyncedRealmTests {
                 Realm.open(config).use {
                     // Make sure that the test eventually fail. Coroutines can cancel a delay
                     // so this doesn't always block the test for 10 seconds.
-                    delay(10 * 1000)
+                    delay(10_000)
                     channel.send(AssertionError("Realm was successfully opened"))
                 }
             }
 
             val error = channel.receiveOrFail()
-            assertTrue(error is UnrecoverableSyncException, "Was $error")
             val message = error.message
             assertNotNull(message)
             assertTrue(