diff --git a/R/bambu.R b/R/bambu.R
index edd8a8cc..c12499a9 100644
--- a/R/bambu.R
+++ b/R/bambu.R
@@ -267,7 +267,7 @@ bambu <- function(reads, annotations = NULL, genome = NULL, NDR = NULL,
             #load in the barcode clustering from file if provided
             iter <- seq_len(ncol(metadata(quantData_i)$countMatrix)) # iter is integer
             if(!is.null(clusters)){
-              if(class(clusters[[i]])!="CompressedCharacterList"){ # !is.list(clusters) is FALSE for CompressedCharacterList 
+              if(!inherits(clusters, "CompressedCharacterList") && !is.list(clusters)){
                 clusterMaps <- NULL
                 for(j in seq_along(metadata(quantData_i)$sampleNames)){ #load in a file per sample name provided
                   clusterMap <- fread(clusters[[j]], header = FALSE, 
@@ -288,7 +288,7 @@ bambu <- function(reads, annotations = NULL, genome = NULL, NDR = NULL,
                 if(length(quantData)>1){
                   iter <- clusters[[i]] #lowMemory mode
                 }else{
-                  iter <- clusters#do.call(c,clusters)
+                  iter <- do.call(c,clusters) #clusters direct assignment in Multiplex_Major_Patch is throwing error
                 }
               }
             }