diff --git a/types/prosemirror-state/index.d.ts b/types/prosemirror-state/index.d.ts
index 92a488d1c7..e85e984c83 100644
--- a/types/prosemirror-state/index.d.ts
+++ b/types/prosemirror-state/index.d.ts
@@ -91,7 +91,7 @@ export class Selection {
   empty: boolean;
   eq(p: Selection): boolean;
   map(doc: Node, mapping: Mappable): Selection;
-  content: Slice;
+  content(): Slice;
   replace(tr: Transaction, content?: Slice): void;
   replaceWith(tr: Transaction, node: Node): void;
   toJSON(): AnyObject;