diff --git a/R/add_path.R b/R/add_path.R
index 5f5e379..9e8e9e1 100644
--- a/R/add_path.R
+++ b/R/add_path.R
@@ -217,6 +217,9 @@ add_path_subdata <- function(subdata, cutoff) {
 
   subdata_path <- lapply(subdata_moves, check_moves, cutoff = cutoff)
   subdata <- dplyr::bind_rows(subdata_path)
+  if (nrow(subdata) != 0) {
+    subdata$path <- as.factor(subdata$path)
+  }
   subdata
 }