diff --git a/src/mol-model/structure/structure/carbohydrates/compute.ts b/src/mol-model/structure/structure/carbohydrates/compute.ts
index 70bd7eb4f0bd5ad1a026c099f61ced0139156c72..039a6157c876c971e1c3a71062facf248c4e735f 100644
--- a/src/mol-model/structure/structure/carbohydrates/compute.ts
+++ b/src/mol-model/structure/structure/carbohydrates/compute.ts
@@ -22,7 +22,12 @@ import { UnitRings, UnitRing } from '../unit/rings';
 import { ElementIndex } from '../../model/indexing';
 
 const C = ElementSymbol('C'), O = ElementSymbol('O');
-const SugarRingFps = [UnitRing.elementFingerprint([C, C, C, C, C, O]), UnitRing.elementFingerprint([C, C, C, C, O])]
+const SugarRingFps = [
+    UnitRing.elementFingerprint([C, C, C, O]),
+    UnitRing.elementFingerprint([C, C, C, C, O]),
+    UnitRing.elementFingerprint([C, C, C, C, C, O]),
+    UnitRing.elementFingerprint([C, C, C, C, C, C, O]),
+]
 
 function getAnomericCarbon(unit: Unit.Atomic, ringAtoms: ArrayLike<StructureElement.UnitIndex>): ElementIndex {
     let indexHasTwoOxygen = -1, indexHasOxygenAndCarbon = -1, indexHasC1Name = -1, indexIsCarbon = -1