diff --git a/gf.cabal b/gf.cabal
--- a/gf.cabal
+++ b/gf.cabal
@@ -1,5 +1,5 @@
 name: gf
-version: 3.1.6
+version: 3.1.6.1
 cabal-version: >= 1.2
 build-type: Custom
 license: GPL
diff --git a/src/compiler/GF/Data/SortedList.hs b/src/compiler/GF/Data/SortedList.hs
--- a/src/compiler/GF/Data/SortedList.hs
+++ b/src/compiler/GF/Data/SortedList.hs