diff --git a/src/shared_realm.hpp b/src/shared_realm.hpp
index e7c3c0f2..8b70d3b1 100644
--- a/src/shared_realm.hpp
+++ b/src/shared_realm.hpp
@@ -132,7 +132,7 @@ namespace realm {
         // Realm after closing it will produce undefined behavior.
         void close();
 
-        bool is_closed() { return m_shared_group == nullptr; }
+        bool is_closed() { return !m_read_only_group && !m_shared_group; }
 
         ~Realm();