Index: Python/ceval.c
===================================================================
--- Python/ceval.c	(Revision 69838)
+++ Python/ceval.c	(Arbeitskopie)
@@ -3898,10 +3898,17 @@
 		PCALL(PCALL_METHOD);
 	else if (PyType_Check(func))
 		PCALL(PCALL_TYPE);
+	else if (PyCFunction_Check(func))
+		PCALL(PCALL_CFUNCTION);
 	else
 		PCALL(PCALL_OTHER);
 #endif
-	result = PyObject_Call(func, callargs, kwdict);
+	if (PyCFunction_Check(func)) {
+		PyThreadState *tstate = PyThreadState_GET();
+		C_TRACE(result, PyCFunction_Call(func, callargs, kwdict));
+	}
+	else
+		result = PyObject_Call(func, callargs, kwdict);
 call_fail:
 	Py_XDECREF(callargs);
 	Py_XDECREF(kwdict);
@@ -3986,10 +3993,17 @@
 		PCALL(PCALL_METHOD);
 	else if (PyType_Check(func))
 		PCALL(PCALL_TYPE);
+	else if (PyCFunction_Check(func))
+		PCALL(PCALL_CFUNCTION);
 	else
 		PCALL(PCALL_OTHER);
 #endif
-	result = PyObject_Call(func, callargs, kwdict);
+	if (PyCFunction_Check(func)) {
+		PyThreadState *tstate = PyThreadState_GET();
+		C_TRACE(result, PyCFunction_Call(func, callargs, kwdict));
+	}
+	else
+		result = PyObject_Call(func, callargs, kwdict);
 ext_call_fail:
 	Py_XDECREF(callargs);
 	Py_XDECREF(kwdict);