diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -363,8 +363,6 @@
     'XsprintfUnknownConversionException' => 'xsprintf/exception/XsprintfUnknownConversionException.php',
   ),
   'function' => array(
-    '_qsprintf_check_scalar_type' => 'xsprintf/qsprintf.php',
-    '_qsprintf_check_type' => 'xsprintf/qsprintf.php',
     'array_fuse' => 'utils/utils.php',
     'array_interleave' => 'utils/utils.php',
     'array_mergev' => 'utils/utils.php',
@@ -460,6 +458,8 @@
     'phutil_var_export' => 'utils/utils.php',
     'ppull' => 'utils/utils.php',
     'qsprintf' => 'xsprintf/qsprintf.php',
+    'qsprintf_check_scalar_type' => 'xsprintf/qsprintf.php',
+    'qsprintf_check_type' => 'xsprintf/qsprintf.php',
     'queryfx' => 'xsprintf/queryfx.php',
     'queryfx_all' => 'xsprintf/queryfx.php',
     'queryfx_one' => 'xsprintf/queryfx.php',
diff --git a/src/xsprintf/qsprintf.php b/src/xsprintf/qsprintf.php
--- a/src/xsprintf/qsprintf.php
+++ b/src/xsprintf/qsprintf.php
@@ -126,7 +126,7 @@
       break;
 
     case 'L': // List of..
-      _qsprintf_check_type($value, "L{$next}", $pattern);
+      qsprintf_check_type($value, "L{$next}", $pattern);
       $pattern = substr_replace($pattern, '', $pos, 1);
       $length  = strlen($pattern);
       $type = 's';
@@ -164,7 +164,7 @@
   }
 
   if (!$done) {
-    _qsprintf_check_type($value, $type, $pattern);
+    qsprintf_check_type($value, $type, $pattern);
     switch ($type) {
       case 's': // String
         if ($nullable && $value === null) {
@@ -240,7 +240,7 @@
   $pattern[$pos] = $type;
 }
 
-function _qsprintf_check_type($value, $type, $query) {
+function qsprintf_check_type($value, $type, $query) {
   switch ($type) {
     case 'Ld':
     case 'Ls':
@@ -259,16 +259,16 @@
       }
 
       foreach ($value as $scalar) {
-        _qsprintf_check_scalar_type($scalar, $type, $query);
+        qsprintf_check_scalar_type($scalar, $type, $query);
       }
       break;
     default:
-      _qsprintf_check_scalar_type($value, $type, $query);
+      qsprintf_check_scalar_type($value, $type, $query);
       break;
   }
 }
 
-function _qsprintf_check_scalar_type($value, $type, $query) {
+function qsprintf_check_scalar_type($value, $type, $query) {
   switch ($type) {
     case 'Q':
     case 'LC':