diff --git a/jedi/evaluate/imports.py b/jedi/evaluate/imports.py
index 77e13500..15b16e14 100644
--- a/jedi/evaluate/imports.py
+++ b/jedi/evaluate/imports.py
@@ -218,7 +218,7 @@ class Importer(object):
                         debug.warning('Attempted relative import beyond top-level package.')
             else:
                 # Here we basically rewrite the level to 0.
-                import_path = tuple(base) + import_path
+                import_path = tuple(base) + tuple(import_path)
         self.import_path = import_path
 
     @property