diff --git a/lib/yaml/scanner.py b/lib/yaml/scanner.py
index 7437ede1..de925b07 100644
--- a/lib/yaml/scanner.py
+++ b/lib/yaml/scanner.py
@@ -1211,7 +1211,7 @@ def scan_flow_scalar_non_spaces(self, double, start_mark):
                     for k in range(length):
                         if self.peek(k) not in '0123456789ABCDEFabcdef':
                             raise ScannerError("while scanning a double-quoted scalar", start_mark,
-                                    "expected escape sequence of %d hexdecimal numbers, but found %r" %
+                                    "expected escape sequence of %d hexadecimal numbers, but found %r" %
                                         (length, self.peek(k)), self.get_mark())
                     code = int(self.prefix(length), 16)
                     chunks.append(chr(code))
@@ -1403,7 +1403,7 @@ def scan_uri_escapes(self, name, start_mark):
             for k in range(2):
                 if self.peek(k) not in '0123456789ABCDEFabcdef':
                     raise ScannerError("while scanning a %s" % name, start_mark,
-                            "expected URI escape sequence of 2 hexdecimal numbers, but found %r"
+                            "expected URI escape sequence of 2 hexadecimal numbers, but found %r"
                             % self.peek(k), self.get_mark())
             codes.append(int(self.prefix(2), 16))
             self.forward(2)