diff --git a/src/forsyde-tikz.sty b/src/forsyde-tikz.sty
index fec4768..9d79be3 100644
--- a/src/forsyde-tikz.sty
+++ b/src/forsyde-tikz.sty
@@ -25,6 +25,7 @@
 \NeedsTeXFormat{LaTeX2e}
 \RequirePackage{pgfplots}
 \RequirePackage{pgfkeys}
+\IfFileExists{l3regex.sty}{\RequirePackage{xparse,l3regex}}{\RequirePackage{xparse}\RequirePackage{expl3}}
 \RequirePackage{xparse,l3regex}
 \RequirePackage{calc}
 \RequirePackage{ezkeys}