diff --git a/Lib/json/encoder.py b/Lib/json/encoder.py
index 41a497c..5cefda8 100644
--- a/Lib/json/encoder.py
+++ b/Lib/json/encoder.py
@@ -269,6 +269,8 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
         str=str,
         tuple=tuple,
         _intstr=int.__str__,
+        true=True,
+        false=False,
     ):
 
     if _indent is not None and not isinstance(_indent, str):
@@ -292,19 +294,19 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
         else:
             newline_indent = None
             separator = _item_separator
-        first = True
+        first = true
         for value in lst:
             if first:
-                first = False
+                first = false
             else:
                 buf = separator
             if isinstance(value, str):
                 yield buf + _encoder(value)
             elif value is None:
                 yield buf + 'null'
-            elif value is True:
+            elif value is true:
                 yield buf + 'true'
-            elif value is False:
+            elif value is false:
                 yield buf + 'false'
             elif isinstance(value, int):
                 # Subclasses of int/float may override __str__, but we still
@@ -348,7 +350,7 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
         else:
             newline_indent = None
             item_separator = _item_separator
-        first = True
+        first = true
         if _sort_keys:
             items = sorted(dct.items(), key=lambda kv: kv[0])
         else:
@@ -361,9 +363,9 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
             elif isinstance(key, float):
                 # see comment for int/float in _make_iterencode
                 key = _floatstr(key)
-            elif key is True:
+            elif key is true:
                 key = 'true'
-            elif key is False:
+            elif key is false:
                 key = 'false'
             elif key is None:
                 key = 'null'
@@ -375,7 +377,7 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
             else:
                 raise TypeError("key " + repr(key) + " is not a string")
             if first:
-                first = False
+                first = false
             else:
                 yield item_separator
             yield _encoder(key)
@@ -384,9 +386,9 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
                 yield _encoder(value)
             elif value is None:
                 yield 'null'
-            elif value is True:
+            elif value is true:
                 yield 'true'
-            elif value is False:
+            elif value is false:
                 yield 'false'
             elif isinstance(value, int):
                 # see comment for int/float in _make_iterencode
@@ -414,9 +416,9 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
             yield _encoder(o)
         elif o is None:
             yield 'null'
-        elif o is True:
+        elif o is true:
             yield 'true'
-        elif o is False:
+        elif o is false:
             yield 'false'
         elif isinstance(o, int):
             # see comment for int/float in _make_iterencode