diff --git a/package.json b/package.json
index 0baf591..8f60df0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/utils",
-	"version": "0.28.2",
+	"version": "0.28.3",
 	"description": "Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",
diff --git a/src/array.ts b/src/array.ts
index 384b3cb..8ed0502 100644
--- a/src/array.ts
+++ b/src/array.ts
@@ -122,6 +122,8 @@ export function sortByProp(prop: string, reverse = false) {
 	return function (a: any, b: any) {
 		const aVal = dotNotation<any>(a, prop);
 		const bVal = dotNotation<any>(b, prop);
+		if(aVal === undefined) return 1;
+		if(bVal === undefined) return -1;
 		if(typeof aVal == 'number' && typeof bVal == 'number')
 			return (reverse ? -1 : 1) * (aVal - bVal);
 		if(aVal > bVal) return reverse ? -1 : 1;
diff --git a/tests/object.spec.ts b/tests/object.spec.ts
index 93a81f4..403eb29 100644
--- a/tests/object.spec.ts
+++ b/tests/object.spec.ts
@@ -62,6 +62,11 @@ describe('Object utilities', () => {
 			dotNotation(obj, 'd.e.f', 5);
 			expect(obj.d.e.f).toBe(5);
 		});
+		it('undefined', () => {
+			const obj: any = {a: 1};
+			const resp = dotNotation(obj, 'a.b');
+			expect(resp).toBe(undefined);
+		})
 	});
 
 	describe('encodeQuery', () => {