diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/javafx/ExtendedProperties.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/javafx/ExtendedProperties.java
index 4998d6eb7..c7b9d59af 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/javafx/ExtendedProperties.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/javafx/ExtendedProperties.java
@@ -129,7 +129,7 @@ public final class ExtendedProperties {
     public static ObjectProperty<Boolean> reservedSelectedPropertyFor(CheckBox checkbox) {
         return (ObjectProperty<Boolean>) checkbox.getProperties().computeIfAbsent(
                 PROP_PREFIX + ".checkbox.reservedSelected",
-                any -> new MappedProperty<>(checkbox, "ext.reservedSelected",
+                any -> new MappedProperty<Boolean, Boolean>(checkbox, "ext.reservedSelected",
                         checkbox.selectedProperty(), it -> !it, it -> !it));
     }
     // ====