1 files changed, 5 insertions, 0 deletions
diff --git a/sources/pyside6/libpyside/pysidesignal.cpp b/sources/pyside6/libpyside/pysidesignal.cpp
index 17071cd1d..ad2a42802 100644
--- a/sources/pyside6/libpyside/pysidesignal.cpp
+++ b/sources/pyside6/libpyside/pysidesignal.cpp
@@ -441,6 +441,11 @@ static PyObject *signalInstanceConnect(PyObject *self, PyObject *args, PyObject
         PyErr_Format(PyExc_RuntimeError, "cannot connect uninitialized SignalInstance");
         return nullptr;
     }
+    if (source->deleted) {
+        PyErr_Format(PyExc_RuntimeError, "Signal source has been deleted");
+        return nullptr;
+    }
+
     Shiboken::AutoDecRef pyArgs(PyList_New(0));
 
     bool match = false;