diff --git a/Objects/setobject.c b/Objects/setobject.c
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -365,12 +302,10 @@
     setentry entry;
     Py_hash_t hash;
 
-    if (!PyUnicode_CheckExact(key) ||
-        (hash = ((PyASCIIObject *) key)->hash) == -1) {
-        hash = PyObject_Hash(key);
-        if (hash == -1)
-            return -1;
-    }
+    hash = PyObject_Hash(key);
+    if (hash == -1)
+        return -1;
+
     entry.key = key;
     entry.hash = hash;
     return set_add_entry(so, &entry);
@@ -405,12 +340,10 @@
 
     assert (PyAnySet_Check(so));
 
-    if (!PyUnicode_CheckExact(key) ||
-        (hash = ((PyASCIIObject *) key)->hash) == -1) {
-        hash = PyObject_Hash(key);
-        if (hash == -1)
-            return -1;
-    }
+    hash = PyObject_Hash(key);
+    if (hash == -1)
+        return -1;
+
     entry.key = key;
     entry.hash = hash;
     return set_discard_entry(so, &entry);
@@ -644,12 +577,10 @@
     setentry entry;
     Py_hash_t hash;
 
-    if (!PyUnicode_CheckExact(key) ||
-        (hash = ((PyASCIIObject *) key)->hash) == -1) {
-        hash = PyObject_Hash(key);
-        if (hash == -1)
-            return -1;
-    }
+    hash = PyObject_Hash(key);
+    if (hash == -1)
+        return -1;
+
     entry.key = key;
     entry.hash = hash;