diff --git a/logfire/_internal/json_encoder.py b/logfire/_internal/json_encoder.py
index 8a48518d..ae7f8a11 100644
--- a/logfire/_internal/json_encoder.py
+++ b/logfire/_internal/json_encoder.py
@@ -299,17 +299,17 @@ def logfire_json_dumps(obj: Any) -> str:
 
 
 def is_sqlalchemy(obj: Any) -> bool:
-    if not hasattr(obj, '__mapper__'):
-        # A SQLModel without `table=True` will pass `isinstance(obj.__class__, DeclarativeMeta)` (I don't know how)
-        # but will fail when retrieving data, specifically when calling `sqlalchemy.inspect`
-        # or when getting the `__mapper__` attribute.
-        return False
-
     try:
+        if not hasattr(obj, '__mapper__'):
+            # A SQLModel without `table=True` will pass `isinstance(obj.__class__, DeclarativeMeta)` (I don't know how)
+            # but will fail when retrieving data, specifically when calling `sqlalchemy.inspect`
+            # or when getting the `__mapper__` attribute.
+            return False
+
         from sqlalchemy.orm import DeclarativeBase, DeclarativeMeta
 
         return isinstance(obj, DeclarativeBase) or isinstance(obj.__class__, DeclarativeMeta)
-    except ImportError:  # pragma: no cover
+    except Exception:
         return False
 
 
diff --git a/tests/test_json_args.py b/tests/test_json_args.py
index ad6a17ba..32ec4987 100644
--- a/tests/test_json_args.py
+++ b/tests/test_json_args.py
@@ -1315,3 +1315,38 @@ def test_numpy_array_truncation(exporter: TestExporter):
             }
         ]
     )
+
+
+def test_bad_getattr(exporter: TestExporter, caplog: pytest.LogCaptureFixture):
+    class A:
+        def __getattr__(self, item: str):
+            raise RuntimeError
+
+        def __repr__(self):
+            return 'A()'
+
+    logfire.info('hello', a=A())
+
+    assert not caplog.messages
+    assert exporter.exported_spans_as_dict() == snapshot(
+        [
+            {
+                'name': 'hello',
+                'context': {'trace_id': 1, 'span_id': 1, 'is_remote': False},
+                'parent': None,
+                'start_time': 1000000000,
+                'end_time': 1000000000,
+                'attributes': {
+                    'logfire.span_type': 'log',
+                    'logfire.level_num': 9,
+                    'logfire.msg_template': 'hello',
+                    'logfire.msg': 'hello',
+                    'code.filepath': 'test_json_args.py',
+                    'code.function': 'test_bad_getattr',
+                    'code.lineno': 123,
+                    'a': '"A()"',
+                    'logfire.json_schema': '{"type":"object","properties":{"a":{"type":"object","x-python-datatype":"unknown"}}}',
+                },
+            }
+        ]
+    )