diff --git a/xespdplain.sty b/xespdplain.sty
index 82ebc13..d6fe2ef 100644
--- a/xespdplain.sty
+++ b/xespdplain.sty
@@ -24,6 +24,7 @@
 
 \RequirePackage{xespdstamp}
 \RequirePackage{calc}
+\RequirePackage{setspace}
 
 \def\XESPD@plain@vt{%
   \setlength{\XESPD@tmpdimc}{%