diff --git a/litellm/llms/anthropic/chat/guardrail_translation/handler.py b/litellm/llms/anthropic/chat/guardrail_translation/handler.py
index 4b763d11652..5aa0dc94b89 100644
--- a/litellm/llms/anthropic/chat/guardrail_translation/handler.py
+++ b/litellm/llms/anthropic/chat/guardrail_translation/handler.py
@@ -861,7 +861,7 @@ class AnthropicMessagesHandler(BaseTranslation):
     def _image_sources(block: Mapping[str, object]) -> tuple[str, ...]:
         """Normalize an Anthropic image block into strings a guardrail can read.
 
-        `source` is one of three shapes (types/llms/anthropic.py:259):
+        `source` is one of three shapes (`AnthropicMessagesImageParam.source`):
 
             {"type": "base64", "media_type": "image/png", "data": "<b64>"}
             {"type": "url",    "url": "https://..."}
diff --git a/tests/test_litellm/llms/anthropic/chat/guardrail_translation/test_anthropic_guardrail_handler.py b/tests/test_litellm/llms/anthropic/chat/guardrail_translation/test_anthropic_guardrail_handler.py
index 2b606b9639a..0fe7730e91e 100644
--- a/tests/test_litellm/llms/anthropic/chat/guardrail_translation/test_anthropic_guardrail_handler.py
+++ b/tests/test_litellm/llms/anthropic/chat/guardrail_translation/test_anthropic_guardrail_handler.py
@@ -1491,7 +1491,7 @@ class MockCanaryMaskingGuardrail(CustomGuardrail):
 
 
 class TestAnthropicMessagesImageSources:
-    """An Anthropic image block has three source shapes (types/llms/anthropic.py:259).
+    """An Anthropic image block has three source shapes (`AnthropicMessagesImageParam.source`).
 
     Only the base64 one carries "data", so reading that key alone drops url images
     entirely -- for every guardrail consuming GenericGuardrailAPIInputs["images"],