1 files changed, 1 insertions, 1 deletions
diff --git a/src/client/views/collections/collectionMulticolumn/MulticolumnResizer.tsx b/src/client/views/collections/collectionMulticolumn/MulticolumnResizer.tsx
index 9fe18d118..273e609ca 100644
--- a/src/client/views/collections/collectionMulticolumn/MulticolumnResizer.tsx
+++ b/src/client/views/collections/collectionMulticolumn/MulticolumnResizer.tsx
@@ -11,7 +11,7 @@ import { StyleProp } from "../../StyleProvider";
 interface ResizerProps {
     width: number;
     styleProvider?: StyleProviderFunc;
-    isContentActive?: () => boolean;
+    isContentActive?: () => boolean | undefined;
     columnUnitLength(): number | undefined;
     toLeft?: Doc;
     toRight?: Doc;