diff --git a/optika/propagators.py b/optika/propagators.py
index 347acae..cc7c0e2 100644
--- a/optika/propagators.py
+++ b/optika/propagators.py
@@ -58,7 +58,7 @@ def accumulate_rays(
     if isinstance(propagators, AbstractRayPropagator):
         propagators = [propagators]
 
-    result = [rays]
+    result = []
     for propagator in propagators:
         rays = propagator.propagate_rays(rays)
         result.append(rays)