diff --git a/src/main/java/qupath/ext/instanseg/ui/InstanSegController.java b/src/main/java/qupath/ext/instanseg/ui/InstanSegController.java
index 8b4e866..bf6bb4d 100644
--- a/src/main/java/qupath/ext/instanseg/ui/InstanSegController.java
+++ b/src/main/java/qupath/ext/instanseg/ui/InstanSegController.java
@@ -9,6 +9,7 @@
 import javafx.beans.property.ObjectProperty;
 import javafx.beans.property.SimpleIntegerProperty;
 import javafx.beans.property.SimpleObjectProperty;
+import javafx.beans.property.StringProperty;
 import javafx.beans.value.ObservableValue;
 import javafx.concurrent.Task;
 import javafx.concurrent.Worker;