diff --git a/types/victory/index.d.ts b/types/victory/index.d.ts
index f5c67995da..549e3823da 100644
--- a/types/victory/index.d.ts
+++ b/types/victory/index.d.ts
@@ -2057,7 +2057,7 @@ declare module "victory" {
       /**
        * The size prop determines how to scale each data point
        */
-      size?: number | { (data: any): number };
+      size?: number | { (data: any): number } | { (data: any, active: boolean): number };
       /**
        * The style prop specifies styles for your VictoryScatter. Any valid inline style properties
        * will be applied. Height, width, and padding should be specified via the height,
diff --git a/types/victory/victory-tests.tsx b/types/victory/victory-tests.tsx
index fcd18571e3..eb3b7bda40 100644
--- a/types/victory/victory-tests.tsx
+++ b/types/victory/victory-tests.tsx
@@ -642,6 +642,32 @@ test = (
     />
 );
 
+test = (
+    <VictoryScatter
+        data={[
+          {x: 1, y: 3},
+          {x: 2, y: 5},
+          {x: 3, y: 4},
+          {x: 4, y: 2},
+          {x: 5, y: 5}
+        ]}
+        size={(d: any) => 5}
+    />
+);
+
+test = (
+    <VictoryScatter
+        data={[
+          {x: 1, y: 3},
+          {x: 2, y: 5},
+          {x: 3, y: 4},
+          {x: 4, y: 2},
+          {x: 5, y: 5}
+        ]}
+        size={(d, a) => (a ? 5 : 3)}
+    />
+);
+
 // VictoryPie test
 test = (
     <VictoryPie