diff --git a/CHANGELOG.md b/CHANGELOG.md
index e53205666f..d405c77d62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Python3.14 compatibility https://github.com/Textualize/rich/pull/3861
 
+### Fixed
+
+- Fixed exception when callling `inspect` on objects with unusual `__qualname__` attribute https://github.com/Textualize/rich/pull/3894
+
 ## [14.1.0] - 2025-06-25
 
 ### Changed
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 4b04786b9c..f4c8010c0e 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -94,3 +94,4 @@ The following people have contributed to the development of Rich:
 - [Jonathan Helmus](https://github.com/jjhelmus)
 - [Brandon Capener](https://github.com/bcapener)
 - [Alex Zheng](https://github.com/alexzheng111)
+- [Sebastian Speitel](https://github.com/SebastianSpeitel)
diff --git a/rich/_inspect.py b/rich/_inspect.py
index 27d65cec93..05d5eecc15 100644
--- a/rich/_inspect.py
+++ b/rich/_inspect.py
@@ -101,6 +101,10 @@ def _get_signature(self, name: str, obj: Any) -> Optional[Text]:
         signature_text = self.highlighter(_signature)
 
         qualname = name or getattr(obj, "__qualname__", name)
+        if not isinstance(qualname, str):
+            qualname = getattr(obj, "__name__", name)
+            if not isinstance(qualname, str):
+                qualname = name
 
         # If obj is a module, there may be classes (which are callable) to display
         if inspect.isclass(obj):
diff --git a/tests/test_inspect.py b/tests/test_inspect.py
index 3f6e5b9fe8..d6972fb5ed 100644
--- a/tests/test_inspect.py
+++ b/tests/test_inspect.py
@@ -404,6 +404,19 @@ class Thing:
     assert render(module, methods=True) == expected
 
 
+def test_qualname_in_slots():
+    from functools import lru_cache
+
+    @lru_cache
+    class Klass:
+        __slots__ = ("__qualname__",)
+
+    try:
+        inspect(Klass)
+    except Exception as e:
+        assert False, f"Class with __qualname__ in __slots__ shouldn't raise {e}"
+
+
 @pytest.mark.parametrize(
     "special_character,expected_replacement",
     (