diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28b0302c7..59b51f3cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,17 @@
 
 [Full Changelog](https://github.com/mozilla/application-services/compare/v0.16.0...master)
 
+## Logins
+
+### What's Fixed
+
+- iOS `LoginRecord`s will no longer use empty strings for `httpRealm` and `formSubmitUrl` in cases where they claim to use nil. ([#623](https://github.com/mozilla/application-services/issues/623))
+    - More broadly, all optional strings in LoginRecords were were being represented as empty strings (instead of nil) unintentionally. This is fixed.
+- iOS: Errors that were being accidentally swallowed should now be properly reported. ([#640](https://github.com/mozilla/application-services/issues/640))
+
+### Breaking changes
+
+- iOS: Code that expects empty strings (and not nil) for optional strings should be updated to check for nil instead. ([#623](https://github.com/mozilla/application-services/issues/623))
 
 # 0.16.0 (_2019-02-06_)
 
diff --git a/components/logins/ios/Logins/LoginRecord.swift b/components/logins/ios/Logins/LoginRecord.swift
index 59f9f1458..66396cebe 100644
--- a/components/logins/ios/Logins/LoginRecord.swift
+++ b/components/logins/ios/Logins/LoginRecord.swift
@@ -121,18 +121,18 @@ open class LoginRecord {
             password: dict["password"] as? String ?? "",
             hostname: dict["hostname"] as? String ?? "",
 
-            username: dict["username"] as? String ?? "",
+            username: dict["username"] as? String,
 
-            formSubmitURL: dict["formSubmitURL"] as? String ?? "",
-            httpRealm: dict["httpRealm"] as? String ?? "",
+            formSubmitURL: dict["formSubmitURL"] as? String,
+            httpRealm: dict["httpRealm"] as? String,
 
             timesUsed: (dict["timesUsed"] as? Int) ?? 0,
             timeLastUsed: (dict["timeLastUsed"] as? Int64) ?? 0,
             timeCreated: (dict["timeCreated"] as? Int64) ?? 0,
             timePasswordChanged: (dict["timePasswordChanged"] as? Int64) ?? 0,
 
-            usernameField: dict["usernameField"] as? String ?? "",
-            passwordField: dict["passwordField"] as? String ?? ""
+            usernameField: dict["usernameField"] as? String,
+            passwordField: dict["passwordField"] as? String
         )
     }