diff --git a/plugins/debian/debsecan_ b/plugins/debian/debsecan_
index 9e89d87e..a49a5c72 100755
--- a/plugins/debian/debsecan_
+++ b/plugins/debian/debsecan_
@@ -72,7 +72,7 @@ if [ ! -x /usr/bin/debsecan ]; then
   exit 1
 fi
 
-source /etc/os-release
+. /etc/os-release
 SUITE=${suite:-$VERSION_CODENAME}
 
 FIXEDWARN=${fixed_warning:-1}