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
@@ -48,6 +48,9 @@ function xsprintf_terminal($userdata, &$pattern, &$pos, &$value, &$length) {
       $value = PhutilTerminalString::escapeStringValue($value, false);
       $type = 's';
       break;
+    case 'd':
+      $type = 'd';
+      break;
     default:
       throw new Exception(
         pht(