diff --git a/algorithms/swedish/stemmer.tt b/algorithms/swedish/stemmer.tt
index aaf8c82..2613c2f 100644
--- a/algorithms/swedish/stemmer.tt
+++ b/algorithms/swedish/stemmer.tt
@@ -43,6 +43,14 @@ Define a valid s-ending as one of
y
+
+Define a valid öst-ending as one of
+
+
+-
+i k l n p r t u v
+
+
Do each of steps 1, 2 and 3.
@@ -93,11 +101,14 @@ Step 3:
- lig ig els
- delete
-
- löst
-
- replace with lös
+
- öst
+
- replace with ös if preceded by a valid öst-ending
- fullt
- replace with full
+ (The letter of the valid öst-ending is not necessarily in R1.
+ Prior to Snowball 2.3.0, öst-ending was effectively just
+ l and was required to be in R1.)
The same algorithm in Snowball