diff --git a/types/tabulator-tables/index.d.ts b/types/tabulator-tables/index.d.ts
index 1161efb0acbe51..be15ae819d1aa1 100755
--- a/types/tabulator-tables/index.d.ts
+++ b/types/tabulator-tables/index.d.ts
@@ -1556,7 +1556,9 @@ export type GroupValuesArg = any[][];
 
 export type TextDirection = "auto" | "ltr" | "rtl";
 
-export type GlobalTooltipOption = boolean | ((event: MouseEvent, cell: CellComponent, onRender: () => void) => string);
+export type GlobalTooltipOption =
+    | boolean
+    | ((event: MouseEvent, cell: CellComponent, onRender: () => void) => string | HTMLElement);
 
 export type CustomMutator = (
     value: any,
diff --git a/types/tabulator-tables/package.json b/types/tabulator-tables/package.json
index 9a6243749f1625..949271c8c55f0c 100644
--- a/types/tabulator-tables/package.json
+++ b/types/tabulator-tables/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@types/tabulator-tables",
-    "version": "6.2.9999",
+    "version": "6.3.9999",
     "projects": [
         "http://tabulator.info"
     ],
diff --git a/types/tabulator-tables/tabulator-tables-tests.ts b/types/tabulator-tables/tabulator-tables-tests.ts
index 33b8d6abfba946..7bca1800fb5239 100644
--- a/types/tabulator-tables/tabulator-tables-tests.ts
+++ b/types/tabulator-tables/tabulator-tables-tests.ts
@@ -440,6 +440,23 @@ colDef.tooltip = (event: MouseEvent, cell: CellComponent, onRendered: (callback:
     return cell.getValue();
 };
 
+// Additional tests for tooltip signature / return values
+// boolean values
+colDef.tooltip = false;
+colDef.tooltip = true;
+
+// function returning a string
+colDef.tooltip = (e: MouseEvent, cell: CellComponent) => {
+    return "Tooltip";
+};
+
+// function returning an HTMLElement
+colDef.tooltip = (e: MouseEvent, cell: CellComponent) => {
+    const el = document.createElement("div");
+    el.innerText = "Tooltip";
+    return el;
+};
+
 // Cell Component
 
 let cell = <CellComponent> {};