diff --git a/src/oss/python/integrations/document_loaders/weather.mdx b/src/oss/python/integrations/document_loaders/weather.mdx
index 44d0cfc8db..75683f0e24 100644
--- a/src/oss/python/integrations/document_loaders/weather.mdx
+++ b/src/oss/python/integrations/document_loaders/weather.mdx
@@ -15,6 +15,7 @@ pip install -qU  pyowm
 ```
 
 ```python
+# Get an [API key](https://home.openweathermap.org/api_keys) first.
 # Set API key either by passing it in to constructor directly
 # or by setting the environment variable "OPENWEATHERMAP_API_KEY".