diff --git a/moviepy/video/compositing/concatenate.py b/moviepy/video/compositing/concatenate.py
index 9efb9b687..11dc24a72 100644
--- a/moviepy/video/compositing/concatenate.py
+++ b/moviepy/video/compositing/concatenate.py
@@ -77,6 +77,8 @@ def concatenate_videoclips(
 
         def make_frame(t):
             i = np.searchsorted(timings, t)
+            if t == timings[-1]:
+                i = -1
             return clips[i].get_frame(t - timings[i])
 
         def get_mask(clip):