diff --git a/src/shared_realm.cpp b/src/shared_realm.cpp
index bff52bce..ae73a9a8 100644
--- a/src/shared_realm.cpp
+++ b/src/shared_realm.cpp
@@ -43,15 +43,13 @@ Realm::Config::Config(const Config& c)
 , cache(c.cache)
 , disable_format_upgrade(c.disable_format_upgrade)
 , automatic_change_notifications(c.automatic_change_notifications)
-, upgrade_final_version(0)
-, upgrade_initial_version(0)
 {
     if (c.schema) {
         schema = std::make_unique<Schema>(*c.schema);
     }
 }
 
-Realm::Config::Config() : schema_version(ObjectStore::NotVersioned), upgrade_initial_version(0), upgrade_final_version(0) { }
+Realm::Config::Config() : schema_version(ObjectStore::NotVersioned) { }
 Realm::Config::Config(Config&&) = default;
 Realm::Config::~Config() = default;
 
diff --git a/src/shared_realm.hpp b/src/shared_realm.hpp
index 20cb630c..75b67694 100644
--- a/src/shared_realm.hpp
+++ b/src/shared_realm.hpp
@@ -82,9 +82,9 @@ namespace realm {
             // everything can be done deterministically on one thread, and
             // speeds up tests that don't need notifications.
             bool automatic_change_notifications = true;
-            // File format versions populated when a file format updrade takes place
+            // File format versions populated when a file format upgrade takes place
             // during realm opening
-            int upgrade_initial_version, upgrade_final_version;
+            int upgrade_initial_version = 0, upgrade_final_version = 0;
             
             Config();
             Config(Config&&);