diff --git a/haskell-indentation.el b/haskell-indentation.el
index b07167159..d0335d774 100644
--- a/haskell-indentation.el
+++ b/haskell-indentation.el
@@ -643,7 +643,11 @@ For example
   (when (string= current-token "instance")
     (haskell-indentation-read-next-token))
   (haskell-indentation-type)
-  (cond ((string= current-token "=")
+  (cond ((eq current-token 'end-tokens)
+         (when (member following-token '("=" "where"))
+           (haskell-indentation-add-indentation current-indent)
+           (throw 'parse-end nil)))
+        ((string= current-token "=")
          (haskell-indentation-separated
           #'haskell-indentation-expression "|" "deriving"))
         ((string= current-token "where")
diff --git a/tests/haskell-indentation-tests.el b/tests/haskell-indentation-tests.el
index fb4255fe5..c34aca7cc 100644
--- a/tests/haskell-indentation-tests.el
+++ b/tests/haskell-indentation-tests.el
@@ -308,6 +308,12 @@ data X = X
               (2 0 2)
               (3 0))
 
+(hindent-test "13b honour = on a separate line in data declaration" "
+data X a b
+  = X"
+              (1 0)
+              (2 2))
+
 (hindent-test "14* Line starting with operator inside \"do\" needs to be indented""
 fun = do
   pure X