diff --git a/semantic-diff.cabal b/semantic-diff.cabal
index 913c3d723..0d4962659 100644
--- a/semantic-diff.cabal
+++ b/semantic-diff.cabal
@@ -30,6 +30,7 @@ library
                      , Data.Mergeable.Generic
                      , Data.Record
                      , Data.Syntax
+                     , Data.Syntax.Algebra
                      , Data.Syntax.Assignment
                      , Data.Syntax.Comment
                      , Data.Syntax.Declaration
diff --git a/src/Data/Syntax/Algebra.hs b/src/Data/Syntax/Algebra.hs
new file mode 100644
index 000000000..49858352a
--- /dev/null
+++ b/src/Data/Syntax/Algebra.hs
@@ -0,0 +1 @@
+module Data.Syntax.Algebra where