diff --git a/src/glum/_glm.py b/src/glum/_glm.py
index af586245..312c243d 100644
--- a/src/glum/_glm.py
+++ b/src/glum/_glm.py
@@ -1631,7 +1631,7 @@ def wald_test(
         )
         if num_lhs_specs != 1:
             raise ValueError(
-                "Exactly one of R, features terms or formula must be specified. "
+                "Exactly one of R, features, terms or formula must be specified. "
                 f"Received {num_lhs_specs} specifications."
             )