diff --git a/src/index.ts b/src/index.ts
index 197413e..9a5cfba 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -125,7 +125,7 @@ function getDecodedEntity(
                     : parseInt(entity.substr(2));
 
             decodeResult =
-                decodeCode >= 0x10ffff
+                decodeCode > 0x10ffff
                     ? outOfBoundsChar
                     : decodeCode > 65535
                     ? fromCodePoint(decodeCode)
diff --git a/test/index.test.ts b/test/index.test.ts
index 37d7311..963b432 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -179,6 +179,15 @@ describe('lib', () => {
                     expect(decode(entity)).toEqual(value);
                 }
             });
+            it('should decode the maximum code point U+10FFFF instead of replacing it', () => {
+                const maxCodePoint = String.fromCodePoint(0x10ffff);
+                expect(decode('')).toEqual(maxCodePoint);
+                expect(decode('')).toEqual(maxCodePoint);
+                // round-trip: encode emits a reference that decode must read back
+                expect(decode(encode(maxCodePoint, {mode: 'nonAscii'}))).toEqual(maxCodePoint);
+                // code points past the Unicode range stay replaced
+                expect(decode('�')).toEqual(String.fromCharCode(65533));
+            });
         });
     });