diff --git a/3rdParty/assimp/CMakeLists.txt b/3rdParty/assimp/CMakeLists.txt
index 6c32a3d..4524135 100644
--- a/3rdParty/assimp/CMakeLists.txt
+++ b/3rdParty/assimp/CMakeLists.txt
@@ -25,7 +25,7 @@ elseif (USE_ASSIMP)
 
     FetchContent_MakeAvailable(assimp)
 
-    set(assimp_FOUND ON PARENT_SCOPE)
+    set(assimp_FOUND "fetched assimp found" CACHE INTERNAL ON)
 endif ()