diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index ca5ab2c..dd8417a 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -1787,7 +1787,7 @@
                 step = -step;
             }
 
-            assert((size_t)slicelen <= PY_SIZE_MAX / sizeof(PyObject *));
+            assert((size_t)slicelen <= SIZE_MAX / sizeof(PyObject *));
 
             /* recycle is a list that will contain all the children
              * scheduled for removal.
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 8afc4d5..21f063d 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -976,7 +976,7 @@
 };
 
 
-#if PY_SIZE_MAX > INT_MAX
+#if SIZE_MAX > INT_MAX
 #define CHECK_STRING_LENGTH(s) do {                                     \
         if (s != NULL && strlen(s) >= INT_MAX) {                        \
             PyErr_SetString(PyExc_OverflowError, "string is too long"); \
diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
index 1a53cfe..ec8bd96 100644
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -655,7 +655,7 @@
         }
     }
 
-    assert(tracemalloc_traced_memory <= PY_SIZE_MAX - size);
+    assert(tracemalloc_traced_memory <= SIZE_MAX - size);
     tracemalloc_traced_memory += size;
     if (tracemalloc_traced_memory > tracemalloc_peak_traced_memory)
         tracemalloc_peak_traced_memory = tracemalloc_traced_memory;
@@ -672,7 +672,7 @@
     PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;
     void *ptr;
 
-    assert(elsize == 0 || nelem <= PY_SIZE_MAX / elsize);
+    assert(elsize == 0 || nelem <= SIZE_MAX / elsize);
 
     if (use_calloc)
         ptr = alloc->calloc(alloc->ctx, nelem, elsize);
diff --git a/Modules/audioop.c b/Modules/audioop.c
index d715783..44e5198 100644
--- a/Modules/audioop.c
+++ b/Modules/audioop.c
@@ -1337,7 +1337,7 @@
     weightA /= d;
     weightB /= d;
 
-    if ((size_t)nchannels > PY_SIZE_MAX/sizeof(int)) {
+    if ((size_t)nchannels > SIZE_MAX/sizeof(int)) {
         PyErr_SetString(PyExc_MemoryError,
                         "not enough memory for output buffer");
         return NULL;