diff --git a/types/opentype.js/index.d.ts b/types/opentype.js/index.d.ts
index 54c22bd468aa8d..23753330bf6530 100644
--- a/types/opentype.js/index.d.ts
+++ b/types/opentype.js/index.d.ts
@@ -167,6 +167,7 @@ export class Glyph {
     name: string | null;
     unicode?: number | undefined;
     unicodes: number[];
+    numberOfContours?: number | undefined;
     xMin?: number | undefined;
     xMax?: number | undefined;
     yMin?: number | undefined;
diff --git a/types/opentype.js/opentype.js-tests.ts b/types/opentype.js/opentype.js-tests.ts
index 123d2c0791c0bf..8dc0fb5593f463 100644
--- a/types/opentype.js/opentype.js-tests.ts
+++ b/types/opentype.js/opentype.js-tests.ts
@@ -132,6 +132,7 @@ defaultGlyph.name = undefined;
 let num: number = defaultGlyph.index + Math.min(...defaultGlyph.unicodes);
 // @ts-expect-error
 num = defaultGlyph.unicode
+    ?? defaultGlyph.numberOfContours
     ?? defaultGlyph.xMin
     ?? defaultGlyph.xMax
     ?? defaultGlyph.yMin