diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 9187d3f47..74bae6587 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -29,6 +29,7 @@ Changelog
  * Fix: Project template no longer raises a deprecation warning (Maximilian Stauss)
  * Fix: `PageManager.sibling_of(page)` and `PageManager.not_sibling_of(page)` now default to inclusive (i.e. `page` is considered a sibling of itself), for consistency with other sibling methods
  * Fix: The "view live" button displayed after publishing a page now correctly reflects any changes made to the page slug (Ryan Pineo)
+ * Fix: API endpoints now accept and ignore the `_` query parameter used by jQuery for cache-busting
 
 
 1.1 (15.09.2015)
diff --git a/docs/releases/1.2.rst b/docs/releases/1.2.rst
index b1f482b86..c8a8d9d5e 100644
--- a/docs/releases/1.2.rst
+++ b/docs/releases/1.2.rst
@@ -65,6 +65,7 @@ Bug fixes
  * Project template no longer raises a deprecation warning (Maximilian Stauss)
  * ``PageManager.sibling_of(page)`` and ``PageManager.not_sibling_of(page)`` now default to inclusive (i.e. ``page`` is considered a sibling of itself), for consistency with other sibling methods
  * The "view live" button displayed after publishing a page now correctly reflects any changes made to the page slug (Ryan Pineo)
+ * API endpoints now accept and ignore the ``_`` query parameter used by jQuery for cache-busting
 
 
 Upgrade considerations
diff --git a/wagtail/contrib/wagtailapi/endpoints.py b/wagtail/contrib/wagtailapi/endpoints.py
index c6a2489fc..26846d598 100644
--- a/wagtail/contrib/wagtailapi/endpoints.py
+++ b/wagtail/contrib/wagtailapi/endpoints.py
@@ -37,6 +37,9 @@ class BaseAPIEndpoint(GenericViewSet):
         'fields',
         'order',
         'search',
+
+        # Used by jQuery for cache-busting. See #1671
+        '_',
     ])
     extra_api_fields = []
     name = None  # Set on subclass.