X-Git-Url: http://nitlanguage.org

diff --git a/src/mixin.nit b/src/mixin.nit
index 94d0c32..1ee4109 100644
--- a/src/mixin.nit
+++ b/src/mixin.nit
@@ -52,7 +52,8 @@ redef class ToolContext
 				mainmodule.is_fictive = true
 			end
 
-			var recv = mainmodule.object_type
+			var recv = mainmodule.sys_type
+			assert recv != null
 			var mclassdef = new MClassDef(mainmodule, recv, location)
 			mclassdef.add_in_hierarchy