diff --git a/api/js/etemplate/Et2Select/Et2SelectAccount.ts b/api/js/etemplate/Et2Select/Et2SelectAccount.ts
index a4c77e7598..3ab73ab421 100644
--- a/api/js/etemplate/Et2Select/Et2SelectAccount.ts
+++ b/api/js/etemplate/Et2Select/Et2SelectAccount.ts
@@ -10,13 +10,14 @@
 import {Et2Select} from "./Et2Select";
 import {SelectOption} from "./FindSelectOptions";
 import {Et2Image} from "../Et2Image/Et2Image";
+import {SelectAccountMixin} from "./SelectAccountMixin";
 
 export type AccountType = 'accounts'|'groups'|'both'|'owngroups';
 
 /**
  * @customElement et2-select-account
  */
-export class Et2SelectAccount extends Et2Select
+export class Et2SelectAccount extends SelectAccountMixin(Et2Select)
 {
 	static get properties()
 	{
diff --git a/api/js/etemplate/Et2Select/Et2SelectReadonly.ts b/api/js/etemplate/Et2Select/Et2SelectReadonly.ts
index e5aceb405e..5792dde514 100644
--- a/api/js/etemplate/Et2Select/Et2SelectReadonly.ts
+++ b/api/js/etemplate/Et2Select/Et2SelectReadonly.ts
@@ -13,6 +13,7 @@ import {et2_IDetachedDOM} from "../et2_core_interfaces";
 import {Et2Widget} from "../Et2Widget/Et2Widget";
 import {StaticOptions} from "./StaticOptions";
 import {find_select_options, SelectOption} from "./FindSelectOptions";
+import {SelectAccountMixin} from "./SelectAccountMixin";
 
 const so = new StaticOptions();
 
@@ -216,53 +217,10 @@ li {
 // @ts-ignore TypeScript is not recognizing that this widget is a LitElement
 customElements.define("et2-select_ro", Et2SelectReadonly);
 
-export class Et2SelectAccountReadonly extends Et2SelectReadonly
+export class Et2SelectAccountReadonly extends SelectAccountMixin(Et2SelectReadonly)
 {
 
-	protected account_options = [];
 
-	get select_options()
-	{
-		return [...this.account_options, ...super.select_options];
-	}
-
-	set select_options(value : SelectOption[])
-	{
-		super.select_options = value;
-	}
-
-	set value(new_value)
-	{
-		super.value = new_value;
-		if(!new_value)
-		{
-			return;
-		}
-		for(let id of this.value)
-		{
-			let account_name = null;
-			let option = <SelectOption>{value: id, label: id + " ..."};
-			this.account_options.push(option);
-			if(new_value && (account_name = this.egw().link_title('api-accounts', id, false)))
-			{
-				option.label = account_name;
-			}
-			else if(!account_name)
-			{
-				// Not already cached, need to fetch it
-				this.egw().link_title('api-accounts', id, true).then(title =>
-				{
-					option.label = title;
-					this.requestUpdate();
-				});
-			}
-		}
-	}
-
-	get value()
-	{
-		return super.value;
-	}
 }
 
 // @ts-ignore TypeScript is not recognizing that this widget is a LitElement
diff --git a/api/js/etemplate/Et2Select/SelectAccountMixin.ts b/api/js/etemplate/Et2Select/SelectAccountMixin.ts
new file mode 100644
index 0000000000..af0234c6e1
--- /dev/null
+++ b/api/js/etemplate/Et2Select/SelectAccountMixin.ts
@@ -0,0 +1,93 @@
+import {SelectOption} from "./FindSelectOptions";
+import {LitElement} from "@lion/core";
+
+/**
+ * EGroupware eTemplate2 - SelectAccountMixin
+ *
+ * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
+ * @package api
+ * @link https://www.egroupware.org
+ * @author Nathan Gray
+ */
+
+/**
+ * Common code for editable & read-only select account
+ * Moved out so we don't have copy+paste code in both
+ */
+export declare class SelectAccountInterface
+{
+	set value(new_value : string | string[])
+
+	get value() : string | string[]
+
+	set select_options(new_options : SelectOption[])
+	get select_options() : SelectOption[]
+}
+
+type Constructor<T = {}> = new (...args : any[]) => T;
+export const SelectAccountMixin = <T extends Constructor<LitElement>>(superclass : T) =>
+{
+	class SelectAccount extends superclass
+	{
+
+		/**
+		 * Hold on to accounts we had to fetch from the server
+		 * @type {any[]}
+		 * @protected
+		 */
+		protected account_options = [];
+
+		/**
+		 * If the value has an account that's not already in the list, check with the server.
+		 * We probably don't have all the accounts client side.  This is similar to freeEntries,
+		 * but a little safer because we don't allow just anything.
+		 *
+		 * @param {any} new_value
+		 */
+		set value(new_value : string | string[])
+		{
+			super.value = new_value;
+			if(!new_value)
+			{
+				return;
+			}
+			let val = Array.isArray(this.value) ? this.value : [this.value];
+			for(let id of val)
+			{
+				let account_name = null;
+				let option = <SelectOption>{value: id, label: id + " ..."};
+				this.account_options.push(option);
+				if(new_value && (account_name = this.egw().link_title('api-accounts', id, false)))
+				{
+					option.label = account_name;
+				}
+				else if(!account_name)
+				{
+					// Not already cached, need to fetch it
+					this.egw().link_title('api-accounts', id, true).then(title =>
+					{
+						option.label = title;
+						this.requestUpdate();
+					});
+				}
+			}
+		}
+
+		get value()
+		{
+			return super.value;
+		}
+
+		get select_options()
+		{
+			return [...this.account_options, ...super.select_options];
+		}
+
+		set select_options(value : SelectOption[])
+		{
+			super.select_options = value;
+		}
+	}
+
+	return SelectAccount as unknown as Constructor<SelectAccountInterface> & T;
+}
\ No newline at end of file