diff --git a/src/braket/parametric/free_parameter.py b/src/braket/parametric/free_parameter.py
index cd2e94793..27e588d79 100644
--- a/src/braket/parametric/free_parameter.py
+++ b/src/braket/parametric/free_parameter.py
@@ -109,7 +109,7 @@ def _validate_name(name: str) -> None:
         if not name:
             raise ValueError("FreeParameter names must be non empty")
         if not isinstance(name, str):
-            raise TypeError("FreeParameter name must be a string")
+            raise TypeError("FreeParameter names must be strings")
         if name.startswith("__"):
             raise ValueError("FreeParameter names must not start with two underscores '__'")