diff --git a/CHANGELOG.md b/CHANGELOG.md
index 045d406c..b5801045 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@
 This document records all notable changes to [HTTPie](https://httpie.io).
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## Unreleased
+
+- Fixed escaping of integer indexes with multiple backslashes in the nested JSON builder. ([#1285](https://github.com/httpie/httpie/issues/1285))
+
 ## [3.0.2](https://github.com/httpie/httpie/compare/3.0.1...3.0.2) (2022-01-24)
 
 [What’s new in HTTPie for Terminal 3.0 →](https://httpie.io/blog/httpie-3.0.0)
diff --git a/httpie/cli/nested_json.py b/httpie/cli/nested_json.py
index 501e3b59..beb52058 100644
--- a/httpie/cli/nested_json.py
+++ b/httpie/cli/nested_json.py
@@ -88,18 +88,18 @@ def tokenize(source: str) -> Iterator[Token]:
             return None
 
         value = ''.join(buffer)
-        for variation, kind in [
-            (int, TokenKind.NUMBER),
-            (check_escaped_int, TokenKind.TEXT),
-        ]:
-            try:
-                value = variation(value)
-            except ValueError:
-                continue
-            else:
-                break
-        else:
-            kind = TokenKind.TEXT
+        kind = TokenKind.TEXT
+        if not backslashes:
+            for variation, kind in [
+                (int, TokenKind.NUMBER),
+                (check_escaped_int, TokenKind.TEXT),
+            ]:
+                try:
+                    value = variation(value)
+                except ValueError:
+                    continue
+                else:
+                    break
 
         yield Token(
             kind, value, start=cursor - (len(buffer) + backslashes), end=cursor
diff --git a/tests/test_json.py b/tests/test_json.py
index b454c034..7b4dff41 100644
--- a/tests/test_json.py
+++ b/tests/test_json.py
@@ -397,6 +397,28 @@ def test_complex_json_arguments_with_non_json(httpbin, request_type, value):
                 '2012': {'x': 2, '[3]': 4},
             },
         ),
+        (
+            [
+                r'a[\0]:=0',
+                r'a[\\1]:=1',
+                r'a[\\\2]:=2',
+                r'a[\\\\\3]:=3',
+                r'a[-1\\]:=-1',
+                r'a[-2\\\\]:=-2',
+                r'a[\\-3\\\\]:=-3',
+            ],
+            {
+                "a": {
+                    "0": 0,
+                    r"\1": 1,
+                    r"\\2": 2,
+                    r"\\\3": 3,
+                    "-1\\": -1,
+                    "-2\\\\": -2,
+                    "\\-3\\\\": -3,
+                }
+            }
+        ),
     ],
 )
 def test_nested_json_syntax(input_json, expected_json, httpbin):