diff --git a/src/SocketCANSharp/SafeFileDescriptorHandle.cs b/src/SocketCANSharp/SafeFileDescriptorHandle.cs
index 0eea94c..9dd7258 100644
--- a/src/SocketCANSharp/SafeFileDescriptorHandle.cs
+++ b/src/SocketCANSharp/SafeFileDescriptorHandle.cs
@@ -53,7 +53,7 @@ public override bool IsInvalid
         {
             get
             {
-                return IsClosed || base.IsInvalid;
+                return IsClosed || base.IsInvalid || (int)handle.ToInt64() == -1;
             }
         }