diff --git a/jsonpointer.py b/jsonpointer.py
index 18e4938..628e964 100644
--- a/jsonpointer.py
+++ b/jsonpointer.py
@@ -228,7 +228,7 @@ def get_part(cls, doc, part):
             if part == '-':
                 return part
 
-            if not JsonPointer._RE_ARRAY_INDEX.match(str(part)):
+            if not JsonPointer._RE_ARRAY_INDEX.fullmatch(str(part)):
                 raise JsonPointerException("'%s' is not a valid sequence index" % part)
 
             return int(part)
diff --git a/tests.py b/tests.py
index d7cee1f..2cfd049 100755
--- a/tests.py
+++ b/tests.py
@@ -215,6 +215,10 @@ def test_trailing_escape(self):
     def test_invalid_escape(self):
         self.assertRaises(JsonPointerException, JsonPointer, '/foo/bar~2')
 
+    def test_leading_zero(self):
+        doc = [0, 1, 2]
+        self.assertRaises(JsonPointerException, resolve_pointer, doc, '/01')
+
 
 class ToLastTests(unittest.TestCase):