diff --git a/types/google.visualization/google.visualization-tests.ts b/types/google.visualization/google.visualization-tests.ts
index d47c10efba..e9067770f9 100644
--- a/types/google.visualization/google.visualization-tests.ts
+++ b/types/google.visualization/google.visualization-tests.ts
@@ -363,6 +363,7 @@ function test_formatter_ArrowFormat() {
         ['Electronics', { v: -2.1, f: '-2.1%' }],
         ['Food', { v: 22, f: '22.0%' }]
     ]);
+    data.setFormattedValue(2, 1, null);
 
     var table = new google.visualization.Table(document.getElementById('arrowformat_div'));
 
diff --git a/types/google.visualization/index.d.ts b/types/google.visualization/index.d.ts
index 6f36ff881a..2d679583d7 100644
--- a/types/google.visualization/index.d.ts
+++ b/types/google.visualization/index.d.ts
@@ -118,7 +118,7 @@ declare namespace google {
             setColumnLabel(columnIndex: number, label: string): void;
             setColumnProperty(columnIndex: number, name: string, value: any): void;
             setColumnProperties(columnIndex: number, properties: Properties): void;
-            setFormattedValue(rowIndex: number, columnIndex: number, formattedValue: string): void;
+            setFormattedValue(rowIndex: number, columnIndex: number, formattedValue: string | null): void;
             setProperty(rowIndex: number, columnIndex: number, name: string, value: any): void;
             setProperties(rowIndex: number, columnIndex: number, properties: Properties): void;
             setRowProperty(rowIndex: number, name: string, value: any): void;