diff --git a/documentation/17.01/solutions/basic-computing/eiffelbase/eiffelbase-tutorial/eiffelbase-kernel/Persistence--storage--and-retrieval.wiki b/documentation/17.01/solutions/basic-computing/eiffelbase/eiffelbase-tutorial/eiffelbase-kernel/Persistence--storage--and-retrieval.wiki
index 90b79968..9fcc5edf 100644
--- a/documentation/17.01/solutions/basic-computing/eiffelbase/eiffelbase-tutorial/eiffelbase-kernel/Persistence--storage--and-retrieval.wiki
+++ b/documentation/17.01/solutions/basic-computing/eiffelbase/eiffelbase-tutorial/eiffelbase-kernel/Persistence--storage--and-retrieval.wiki
@@ -103,7 +103,7 @@ retrieve (p: PATH)
     do
         create f.make_with_path (p)
         f.open_read
-	create reader.make_for_reading (f)
+        create reader.make_for_reading (f)
         if attached {MY_TYPE} retrieved (reader, False) as data then 
             -- Retrieved result is of expected type.
             -- Proceed with processing of result,