diff --git a/io_scene_a3d/BattleMapBlenderImporter.py b/io_scene_a3d/BattleMapBlenderImporter.py
index bd5e4e4..854bc98 100644
--- a/io_scene_a3d/BattleMapBlenderImporter.py
+++ b/io_scene_a3d/BattleMapBlenderImporter.py
@@ -391,7 +391,7 @@ class Prop:
         self.mainObject = None
 
     def loadModel(self, modelPath):
-        fileExtension = modelPath.split(".")[-1]
+        fileExtension = modelPath.split(".")[-1].lower()
         if fileExtension == "a3d":
             modelData = A3D()
             with open(modelPath, "rb") as file: modelData.read(file)