diff --git a/libs/sysplugins/smarty_internal_compile_private_special_variable.php b/libs/sysplugins/smarty_internal_compile_private_special_variable.php
index d02c5cd1..62900767 100644
--- a/libs/sysplugins/smarty_internal_compile_private_special_variable.php
+++ b/libs/sysplugins/smarty_internal_compile_private_special_variable.php
@@ -77,7 +77,7 @@ class Smarty_Internal_Compile_Private_Special_Variable extends Smarty_Internal_C
                         $compiler->trigger_template_error("(secure mode) super globals not permitted");
                         break;
                     }
-                    $variableToUpper = strtr($variable, 'abcdefghijklmnopqrstuvwxyz', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ');
+                    $variableUpper = strtr($variable, 'abcdefghijklmnopqrstuvwxyz', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ');
                     $compiled_ref = '$_' . $variableUpper;
                     break;
                 case 'template':