diff --git a/src/lib.rs b/src/lib.rs
index 9f7053d..c1b2c3c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -210,7 +210,7 @@ pub fn os(general_readout: &GeneralReadout) -> Option<String> {
                 }
             }
         }
-        _ => general_readout.os_name().ok(),
+        _ => Some(general_readout.os_name().ok()?.replace("Unknown", "")),
     }
 }