diff --git a/src/openrct2-ui/windows/EditorInventionsList.cpp b/src/openrct2-ui/windows/EditorInventionsList.cpp
index 76cc8a1b9d..749c605b99 100644
--- a/src/openrct2-ui/windows/EditorInventionsList.cpp
+++ b/src/openrct2-ui/windows/EditorInventionsList.cpp
@@ -619,6 +619,7 @@ public:
         if (inventionListWindow == nullptr)
         {
             Close();
+            return;
         }
         std::optional<InventionListItem> res;
         // Skip always researched items, so that the dragged item gets placed underneath them