diff --git a/stim/visualization/aabbn.h b/stim/visualization/aabbn.h
index 3a0d7f2..48e0f5b 100644
--- a/stim/visualization/aabbn.h
+++ b/stim/visualization/aabbn.h
@@ -95,7 +95,7 @@ struct aabbn{
 
 	CUDA_CALLABLE void trim_high(T* b){
 		for(size_t d = 0; d < D; d++)
-			if(low[d] > b[d]) low[d] = b[d];
+			if(high[d] > b[d]) high[d] = b[d];
 	}
 
 	CUDA_CALLABLE T length(size_t d) {
--
libgit2 0.21.4