diff --git a/README.md b/README.md
index df037b9..ab24aa2 100644
--- a/README.md
+++ b/README.md
@@ -114,6 +114,11 @@ $ git push --tags origin
 
 ## Version History / Release Notes
 
+* v0.14.1 (unreleased)
+    * Fixed parsing of signed hexadecimal literals such as `-0x1f` and
+      `+0xff`, which previously raised a `ValueError` instead of parsing
+      to an integer.
+
 * v0.14.0 (2026-03-27)
   This is really just a dependency bump release.
     * No (non-test) code changes.
diff --git a/json5/lib.py b/json5/lib.py
index c6c82d1..15b33e9 100644
--- a/json5/lib.py
+++ b/json5/lib.py
@@ -360,7 +360,8 @@ def _walk_ast(
         return False
     ty, v = el
     if ty == 'number':
-        if v.startswith('0x') or v.startswith('0X'):
+        unsigned = v[1:] if v.startswith('-') else v
+        if unsigned.startswith('0x') or unsigned.startswith('0X'):
             return parse_int(v, base=16)
         if '.' in v or 'e' in v or 'E' in v:
             return parse_float(v)
diff --git a/tests/lib_test.py b/tests/lib_test.py
index 72b85da..d0d6597 100644
--- a/tests/lib_test.py
+++ b/tests/lib_test.py
@@ -102,6 +102,12 @@ def test_numbers(self):
         self.check('0x123456', 1193046)
         self.check_fail('0x+', '<string>:1 Unexpected "+" at column 3')
 
+        # signed hex literals
+        self.check('+0xf', 15)
+        self.check('-0xf', -15)
+        self.check('-0XABCD', -43981)
+        self.check('-0x0', 0)
+
         # floats
         self.check('1.5', 1.5)
         self.check('1.5e3', 1500.0)