diff --git a/newsfragments/2146.doc.rst b/newsfragments/2146.doc.rst
new file mode 100644
index 0000000000..f66b35cc11
--- /dev/null
+++ b/newsfragments/2146.doc.rst
@@ -0,0 +1 @@
+Clarify some contract ``ValueError`` error messages.
diff --git a/web3/contract.py b/web3/contract.py
index d3ff8dfd22..2dc7e89290 100644
--- a/web3/contract.py
+++ b/web3/contract.py
@@ -689,7 +689,7 @@ def check_forbidden_keys_in_transaction(
     ) -> None:
         keys_found = set(transaction.keys()) & set(forbidden_keys)
         if keys_found:
-            raise ValueError("Cannot set '{}' field in transaction".format(', '.join(keys_found)))
+            raise ValueError("Cannot set '{}' field(s) in transaction".format(', '.join(keys_found)))
 
 
 class ConciseMethod: