diff --git a/src/Data/Syntax/Assignment.hs b/src/Data/Syntax/Assignment.hs
index 791f321a8..6305d5857 100644
--- a/src/Data/Syntax/Assignment.hs
+++ b/src/Data/Syntax/Assignment.hs
@@ -78,6 +78,7 @@ module Data.Syntax.Assignment
 , while
 -- Results
 , Error(..)
+, nodeError
 , errorCallStack
 , formatErrorWithOptions
 , firstSet