diff --git a/src/loci/formats/S3FileSystemStore.java b/src/loci/formats/S3FileSystemStore.java
index 7d66928..ed631f4 100644
--- a/src/loci/formats/S3FileSystemStore.java
+++ b/src/loci/formats/S3FileSystemStore.java
@@ -98,7 +98,7 @@ public String getRoot() {
 
     private void setupClient() {
       String[] pathSplit = root.toString().split(File.separator);
-      String endpoint = "ENDPPOINT_PROTOCOL" + pathSplit[1] + File.separator;
+      String endpoint = ENDPPOINT_PROTOCOL + pathSplit[1] + File.separator;
       try {   
         client = AmazonS3ClientBuilder.standard()
           .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(endpoint, "auto"))