--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -729,13 +729,11 @@ Python3_Init(void)
 #else
 	PyMac_Initialize();
 #endif
-	/* Initialise threads, and save the state using PyGILState_Ensure.
-	 * Without the call to PyGILState_Ensure, thread specific state (such
-	 * as the system trace hook), will be lost between invocations of
-	 * Python code. */
+	/* Initialise threads, and below save the state using
+	 * PyEval_SaveThread.  Without the call to PyEval_SaveThread, thread
+	 * specific state (such as the system trace hook), will be lost
+	 * between invocations of Python code. */
 	PyEval_InitThreads();
-	pygilstate = PyGILState_Ensure();
-
 #ifdef DYNAMIC_PYTHON3
 	get_py3_exceptions();
 #endif
@@ -754,13 +752,14 @@ Python3_Init(void)
 	 */
 	PyRun_SimpleString("import vim; import sys; sys.path = list(filter(lambda x: not x.endswith('must>not&exist'), sys.path))");
 
-	// lock is created and acquired in PyEval_InitThreads() and thread
-	// state is created in Py_Initialize()
-	// there _PyGILState_NoteThreadState() also sets gilcounter to 1
-	// (python must have threads enabled!)
-	// so the following does both: unlock GIL and save thread state in TLS
-	// without deleting thread state
-	PyGILState_Release(pygilstate);
+	/* lock is created and acquired in PyEval_InitThreads() and thread
+	 * state is created in Py_Initialize()
+	 * there _PyGILState_NoteThreadState() also sets gilcounter to 1
+	 * (python must have threads enabled!)
+	 * so the following does both: unlock GIL and save thread state in TLS
+	 * without deleting thread state
+	 */
+	PyEval_SaveThread();
 
 	py3initialised = 1;
     }