diff --git a/Modules/symtablemodule.c b/Modules/symtablemodule.c
index 60f9ba9..15c0f92 100644
--- a/Modules/symtablemodule.c
+++ b/Modules/symtablemodule.c
@@ -52,6 +52,9 @@
 {
     PyObject *m;
 
+    if (PyType_Ready(&PySTEntry_Type) < 0)
+        return;
+
     m = Py_InitModule("_symtable", symtable_methods);
     if (m == NULL)
         return;
diff --git a/Objects/object.c b/Objects/object.c
index 9fea13a..e732dce 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -2198,6 +2198,18 @@
 
     if (PyType_Ready(&PyFile_Type) < 0)
         Py_FatalError("Can't initialize file type");
+
+    if (PyType_Ready(&PyCapsule_Type) < 0)
+        Py_FatalError("Can't initialize capsule type");
+
+    if (PyType_Ready(&PyCell_Type) < 0)
+        Py_FatalError("Can't initialize cell type");
+
+    if (PyType_Ready(&PyCallIter_Type) < 0)
+        Py_FatalError("Can't initialize call iter type");
+
+    if (PyType_Ready(&PySeqIter_Type) < 0)
+        Py_FatalError("Can't initialize sequence iterator type");
 }
 
 
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 79b87df..a4c04f4 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -8847,6 +8847,12 @@
         );
 
     PyType_Ready(&EncodingMapType);
+
+    if (PyType_Ready(&PyFieldNameIter_Type) < 0)
+        Py_FatalError("Can't initialize field name iterator type");
+
+    if (PyType_Ready(&PyFormatterIter_Type) < 0)
+        Py_FatalError("Can't initialize formatter iter type");
 }
 
 /* Finalize the Unicode implementation */