diff --git a/hassio/coresys.py b/hassio/coresys.py
index 494b38ac6..878f75555 100644
--- a/hassio/coresys.py
+++ b/hassio/coresys.py
@@ -264,6 +264,6 @@ class CoreSysAttributes:
 
     def __getattr__(self, name):
         """Mapping to coresys."""
-        if name.startswith("sys_") and hasattr(self.coresys, name[5:]):
-            return getattr(self.coresys, name[5:])
+        if name.startswith("sys_") and hasattr(self.coresys, name[4:]):
+            return getattr(self.coresys, name[4:])
         raise AttributeError()