diff --git a/src/mol-model/structure/model/properties/utils/secondary-structure.ts b/src/mol-model/structure/model/properties/utils/secondary-structure.ts
index afb3f4aedb619d48313ae02d8c623f6bf0e03d54..2d6a1153c19b960e97e89f293dbf2f84640c585d 100644
--- a/src/mol-model/structure/model/properties/utils/secondary-structure.ts
+++ b/src/mol-model/structure/model/properties/utils/secondary-structure.ts
@@ -214,7 +214,7 @@ namespace DSSPType {
 }
 
 /** max distance between two C-alpha atoms to check for hbond */
-const caMaxDist = 7.0;
+const caMaxDist = 9.0;
 
 /** min distance between two C-alpha atoms to check for hbond */
 const caMinDist = 0.5;