diff --git a/src/openrct2/rct1/S4Importer.cpp b/src/openrct2/rct1/S4Importer.cpp
index 4e2c7f8dda..1b8198863f 100644
--- a/src/openrct2/rct1/S4Importer.cpp
+++ b/src/openrct2/rct1/S4Importer.cpp
@@ -341,7 +341,14 @@ private:
     std::string GetRCT1ScenarioName()
     {
         const scenario_index_entry * scenarioEntry = _scenarioRepository->GetByInternalName(_s4.scenario_name);
-        return path_get_filename(scenarioEntry->path);
+        if (scenarioEntry == nullptr)
+        {
+            return "";
+        }
+        else
+        {
+            return path_get_filename(scenarioEntry->path);
+        }
     }
 
     void InitialiseEntryMaps()