diff --git a/docs/api-guide/generic-views.md b/docs/api-guide/generic-views.md
index a0ed7bdea..eb000e2c6 100644
--- a/docs/api-guide/generic-views.md
+++ b/docs/api-guide/generic-views.md
@@ -328,7 +328,7 @@ For example, if you need to lookup objects based on multiple fields in the URL c
             queryset = self.filter_queryset(queryset)  # Apply any filter backends
             filter = {}
             for field in self.lookup_fields:
-                if self.kwargs[field]: # Ignore empty fields.
+                if field in self.kwargs: # Ignore empty fields.
                     filter[field] = self.kwargs[field]
             obj = get_object_or_404(queryset, **filter)  # Lookup the object
             self.check_object_permissions(self.request, obj)