diff --git a/packages/joint-core/types/geometry.d.ts b/packages/joint-core/types/geometry.d.ts
index 82ef8acf8a..06ddce727f 100644
--- a/packages/joint-core/types/geometry.d.ts
+++ b/packages/joint-core/types/geometry.d.ts
@@ -395,7 +395,7 @@ export class Path {
 
     equals(p: Path): boolean;
 
-    getSegment(index: number): Segment | null;
+    getSegment(index: number): Segment;
 
     getSegmentSubdivisions(opt?: PrecisionOpt): Curve[][];