diff --git a/src/xsprintf/tsprintf.php b/src/xsprintf/tsprintf.php
--- a/src/xsprintf/tsprintf.php
+++ b/src/xsprintf/tsprintf.php
@@ -48,6 +48,11 @@
       $value = PhutilTerminalString::escapeStringValue($value, false);
       $type = 's';
       break;
+    case '?':
+      $value = tsprintf('<bg:green>**  ?  **</bg> %s', $value);
+      $value = PhutilTerminalString::escapeStringValue($value, false);
+      $type = 's';
+      break;
     case 'd':
       $type = 'd';
       break;