diff --git a/src/xsprintf/tsprintf.php b/src/xsprintf/tsprintf.php
index 8bc1d8b4..aea1e7f4 100644
--- a/src/xsprintf/tsprintf.php
+++ b/src/xsprintf/tsprintf.php
@@ -1,61 +1,64 @@
 <?php
 
 /**
  * Format text for terminal output. This function behaves like `sprintf`,
  * except that all the normal conversions (like "%s") will be properly escaped,
  * and additional conversions are supported:
  *
  *   %B (Block)
  *     Escapes text, but preserves tabs and newlines.
  *
  *   %R (Raw String)
  *     Inserts raw, unescaped text. DANGEROUS!
  *
  * Particularly, this will escape terminal control characters.
  */
 function tsprintf($pattern /* , ... */) {
   $args = func_get_args();
   $args[0] = PhutilConsoleFormatter::interpretFormat($args[0]);
   $string = xsprintf('xsprintf_terminal', null, $args);
   return new PhutilTerminalString($string);
 }
 
 /**
  * Callback for terminal encoding, see @{function:tsprintf} for use.
  */
 function xsprintf_terminal($userdata, &$pattern, &$pos, &$value, &$length) {
   $type = $pattern[$pos];
 
   switch ($type) {
     case 's':
       $value = PhutilTerminalString::escapeStringValue($value, false);
       $type = 's';
       break;
     case 'B':
       $value = PhutilTerminalString::escapeStringValue($value, true);
       $type = 's';
       break;
     case 'R':
       $type = 's';
       break;
     case 'W':
       $value = PhutilTerminalString::escapeStringValue($value, true);
       $value = phutil_console_wrap($value);
       $type = 's';
       break;
     case '!':
       $value = tsprintf('<bg:yellow>** <!> %s **</bg>', $value);
       $value = PhutilTerminalString::escapeStringValue($value, false);
       $type = 's';
       break;
+    case 'd':
+      $type = 'd';
+      break;
     default:
       throw new Exception(
         pht(
           'Unsupported escape sequence "%s" found in pattern: %s',
           $type,
           $pattern));
       break;
   }
 
   $pattern[$pos] = $type;
 }