diff --git a/src/firebird/driver/core.py b/src/firebird/driver/core.py
index 9d5375e..a5154ee 100644
--- a/src/firebird/driver/core.py
+++ b/src/firebird/driver/core.py
@@ -1799,7 +1799,7 @@ def __del__(self):
             warn("Connection disposed without prior close()", ResourceWarning)
             self._close()
             self._close_internals()
-            with contextlib.suppress:
+            with contextlib.suppress(DatabaseError):
                 self._att.detach()
     def __enter__(self) -> Self:
         return self