diff --git a/components/lib/selectbutton/SelectButton.js b/components/lib/selectbutton/SelectButton.js
index 28a7b69a07..1673906b0c 100644
--- a/components/lib/selectbutton/SelectButton.js
+++ b/components/lib/selectbutton/SelectButton.js
@@ -23,7 +23,7 @@ export const SelectButton = React.memo(
 
             let selected = isSelected(event.option);
 
-            if (selected && (!props.unselectable || props.allowEmpty)) {
+            if (selected && !(props.unselectable || props.allowEmpty)) {
                 return;
             }
 
diff --git a/components/lib/selectbutton/selectbutton.d.ts b/components/lib/selectbutton/selectbutton.d.ts
index 7811e8db4e..31219be908 100644
--- a/components/lib/selectbutton/selectbutton.d.ts
+++ b/components/lib/selectbutton/selectbutton.d.ts
@@ -119,6 +119,7 @@ export interface SelectButtonProps extends Omit<React.DetailedHTMLProps<React.In
     multiple?: boolean | undefined;
     /**
      * Whether selection can be cleared.
+     * @deprecated Use 'allowEmpty' property instead.
      * @defaultValue true
      */
     unselectable?: boolean | undefined;