diff --git a/blender/scripts/addons/io_export_rbdoom_map_json.py b/blender/scripts/addons/io_export_rbdoom_map_json.py
index eee1c147..753eb5b5 100644
--- a/blender/scripts/addons/io_export_rbdoom_map_json.py
+++ b/blender/scripts/addons/io_export_rbdoom_map_json.py
@@ -139,7 +139,7 @@ def export_map( filename ):
     f.close()
 
 
-class ExportMap( bpy.types.Operator, ImportHelper ):
+class ExportMap( bpy.types.Operator, ExportHelper ):
     """Save a JSON file"""
     bl_idname = "export_scene.rbdoom_map_json"
     bl_label = "Export RBDOOM-3-BFG JSON map"