diff --git a/postgrest_py/base_request_builder.py b/postgrest_py/base_request_builder.py
index 0ebbb893..350a71d0 100644
--- a/postgrest_py/base_request_builder.py
+++ b/postgrest_py/base_request_builder.py
@@ -212,9 +212,10 @@ def __init__(self, session: Union[AsyncClient, SyncClient]):
         BaseFilterRequestBuilder.__init__(self, session)
 
     def order(self, column: str, *, desc=False, nullsfirst=False):
-        self.session.params[
-            "order"
-        ] = f"{column}{'.desc' if desc else ''}{'.nullsfirst' if nullsfirst else ''}"
+        self.session.params.add(
+            "order",
+            f"{column}{'.desc' if desc else ''}{'.nullsfirst' if nullsfirst else ''}",
+        )
         return self
 
     def limit(self, size: int, *, start=0):