diff --git a/build/scripts/debian_build.sh b/build/scripts/debian_build.sh
index 49f8b4e..1711152 100755
--- a/build/scripts/debian_build.sh
+++ b/build/scripts/debian_build.sh
@@ -11,6 +11,6 @@ sed -i "s/VERSION/$3/" debian/DEBIAN/control
 cp debian/DEBIAN/copyright debian/usr/share/doc/ipentool/
 cp "$2" debian/usr/share/ipentool/logo.svg
 
-SIZE=$(du -s --apparent-size | cut -f1)
+SIZE=$(du -s --apparent-size debian | cut -f1)
 sed -i "s/INSTALLEDSIZE/$SIZE/" debian/DEBIAN/control
 dpkg-deb -b debian "out/ipentool_$3_all.deb"