diff --git a/src/ffi/dictobject.rs b/src/ffi/dictobject.rs
index 046f8896cc3..685afb58a45 100644
--- a/src/ffi/dictobject.rs
+++ b/src/ffi/dictobject.rs
@@ -69,6 +69,8 @@ pub unsafe fn PyDictViewSet_Check(op: *mut PyObject) -> c_int {
 extern "C" {
     #[cfg_attr(PyPy, link_name = "PyPyDict_New")]
     pub fn PyDict_New() -> *mut PyObject;
+    #[cfg(not(PyPy))]
+    pub fn _PyDict_NewPresized(minused: Py_ssize_t) -> *mut PyObject;
     #[cfg_attr(PyPy, link_name = "PyPyDict_GetItem")]
     pub fn PyDict_GetItem(mp: *mut PyObject, key: *mut PyObject) -> *mut PyObject;
     pub fn PyDict_GetItemWithError(mp: *mut PyObject, key: *mut PyObject) -> *mut PyObject;