diff --git a/jsys.sty b/jsys.sty
index 81e2b89..2a57f77 100644
--- a/jsys.sty
+++ b/jsys.sty
@@ -42,6 +42,7 @@
 \usepackage{booktabs}
 \usepackage{multirow}
 \usepackage{tabularx}
+\usepackage{etoolbox}
 \BeforeBeginEnvironment{tabular}{\small}
 \AfterEndEnvironment{tabular}{}