diff --git a/resources/ormc_handout.cls b/resources/ormc_handout.cls
index 66d7fa9..75c907b 100755
--- a/resources/ormc_handout.cls
+++ b/resources/ormc_handout.cls
@@ -301,6 +301,7 @@
 
 \RequirePackage{enumitem}  % List customization
 \RequirePackage{etoolbox}  % For utilities like \undef
+\RequirePackage{xparse}    % For \NewDocumentCommand and etc
 \RequirePackage{xcolor}    % For colored text
 \RequirePackage{tikz}      % Used by \boxlinehack
 \RequirePackage{comment}   % Used to hide solutions
@@ -437,7 +438,7 @@
 % ---------------- %
 
 % Helper command that creates a label with custom text.
-% Аrgs: label name, custom text
+% Args: label name, custom text
 \newcommand{\@customlabel}[2]{%
 	\protected@write\@auxout{}{\string\newlabel{#1}{{#2}{}}}%
 }