diff --git a/openedx/core/lib/cache_utils.py b/openedx/core/lib/cache_utils.py
index b53aeedf88..c379ab2d96 100644
--- a/openedx/core/lib/cache_utils.py
+++ b/openedx/core/lib/cache_utils.py
@@ -126,7 +126,7 @@ class process_cached:  # pylint: disable=invalid-name
         self.cache = {}
 
     def __call__(self, *args):
-        if not isinstance(args, collections.Hashable):
+        if not isinstance(args, collections.abc.Hashable):
             # uncacheable. a list, for instance.
             # better to not cache than blow up.
             return self.func(*args)