diff --git a/src/duplicacy_gcdstorage.go b/src/duplicacy_gcdstorage.go
index aa0457c..9cb40b7 100644
--- a/src/duplicacy_gcdstorage.go
+++ b/src/duplicacy_gcdstorage.go
@@ -329,7 +329,7 @@ func CreateGCDStorage(tokenFile string, storagePath string, threads int) (storag
 				return nil, err
 			}
 		} else if !isDir {
-			return nil, fmt.Errorf("%s/%s is not a directory", storagePath+"/"+dir)
+			return nil, fmt.Errorf("%s/%s is not a directory", storagePath, dir)
 		} else {
 			storage.idCache[dir] = dirID
 		}