diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index da2bb37..b7019e3 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -556,7 +556,7 @@
         return status;
     }
 
-    /* Create the GIL */
+    /* Create the GIL and the pending calls lock */
     status = _PyEval_InitThreads(tstate);
     if (_PyStatus_EXCEPTION(status)) {
         return status;
@@ -1581,6 +1581,12 @@
         goto error;
     }
 
+    /* Create the pending calls lock */
+    status = _PyEval_InitThreads(tstate);
+    if (_PyStatus_EXCEPTION(status)) {
+        return status;
+    }
+
     *tstate_p = tstate;
     return _PyStatus_OK();