diff --git a/Sources/ListMonitor.swift b/Sources/ListMonitor.swift
index 1750802..b8da0b1 100644
--- a/Sources/ListMonitor.swift
+++ b/Sources/ListMonitor.swift
@@ -232,7 +232,7 @@ public final class ListMonitor<D: DynamicObject>: Hashable {
             !self.isPendingRefetch || Thread.isMainThread,
             "Attempted to access a \(cs_typeName(self)) outside the main thread while a refetch is in progress."
         )
-        return self.fetchedResultsController.fetchedObjects?.count ?? 0
+        return (self.fetchedResultsController.fetchedObjects as NSArray?)?.count ?? 0
     }
     
     /**