diff --git a/lib/chkconfig.ltx b/lib/chkconfig.ltx
index fcac24b89c..317e2d8f6b 100644
--- a/lib/chkconfig.ltx
+++ b/lib/chkconfig.ltx
@@ -242,6 +242,7 @@
 \TestPackage{endnotes}
 \TestPackage{enumitem}
 \TestPackage{esint}
+\TestPackage{ifsym}
 \TestPackage{ifthen}
 \TestPackage{fancybox}
 \TestPackage{fancyhdr}