diff --git a/sentry_sdk/traces.py b/sentry_sdk/traces.py
index 1c58e4a1cb..a63a9bebb0 100644
--- a/sentry_sdk/traces.py
+++ b/sentry_sdk/traces.py
@@ -39,7 +39,10 @@ def __init__(
         trace_id: "Optional[str]" = None,
     ):
         self.name: str = name
-        self._attributes: "Attributes" = attributes or {}
+        self._attributes: "Attributes" = {}
+        if attributes:
+            for attribute, value in attributes.items():
+                self.set_attribute(attribute, value)
 
         self._trace_id = trace_id