diff --git a/sqlmodel/_compat.py b/sqlmodel/_compat.py
index 72ec8330fd..ae47b33adb 100644
--- a/sqlmodel/_compat.py
+++ b/sqlmodel/_compat.py
@@ -193,7 +193,7 @@ def get_type_from_field(field: Any) -> Any:
             # Non optional unions are not allowed
             if bases[0] is not NoneType and bases[1] is not NoneType:
                 raise ValueError(
-                    "Cannot have a (non-optional) union as a SQLlchemy field"
+                    "Cannot have a (non-optional) union as a SQLAlchemy field"
                 )
             # Optional unions are allowed
             return bases[0] if bases[0] is not NoneType else bases[1]