diff --git a/resources/ormc_handout.cls b/resources/ormc_handout.cls
index 63e5b62..027a6d7 100755
--- a/resources/ormc_handout.cls
+++ b/resources/ormc_handout.cls
@@ -39,8 +39,8 @@
 % Hack to allow script option override.
 % To force a build with solutions, compile a file containing the following:
 %	`\def\argYesSolutions{1}\input{<target file>}`
-\ifdefined\argYesSolutions\solutionstrue\fi
-\ifdefined\argNoSolutions\solutionsfalse\fi
+\ifdefined\argYesSolutions\@solutionstrue\fi
+\ifdefined\argNoSolutions\@solutionsfalse\fi