diff --git a/control.py b/control.py
index 6c57b1a..0bf49fc 100644
--- a/control.py
+++ b/control.py
@@ -231,7 +231,7 @@ class ControlNetAdvanced(ControlNet):
                 real_index = keyframe.batch_index
                 # if negative, count from end
                 if real_index < 0:
-                    real_index = latent_count + real_index
+                    real_index += latent_count if self.sub_idxs is None else self.full_latent_length
 
                 # if not mapping indeces, what you see is what you get
                 if mapped_indeces is None: