diff --git a/src/openrct2/rct2/S6Importer.cpp b/src/openrct2/rct2/S6Importer.cpp
index 2042c733f7..12b5a89e22 100644
--- a/src/openrct2/rct2/S6Importer.cpp
+++ b/src/openrct2/rct2/S6Importer.cpp
@@ -105,7 +105,7 @@ public:
 
     void LoadFromStream(IStream * stream, bool isScenario) override
     {
-        if (!gConfigGeneral.allow_loading_with_incorrect_checksum && !SawyerEncoding::ValidateChecksum(stream))
+        if (isScenario && !gConfigGeneral.allow_loading_with_incorrect_checksum && !SawyerEncoding::ValidateChecksum(stream))
         {
             throw IOException("Invalid checksum.");
         }