diff --git a/install.sh b/install.sh
index b388afcb..c0297861 100755
--- a/install.sh
+++ b/install.sh
@@ -100,8 +100,8 @@ function install_symlink()
 
 function postinstall()
 {
-    update-desktop-database ${desktopdir}
-    register_installed_file "$desktopdir/mimeinfo.cache"
+    update-desktop-database "$DESTDIR$desktopdir"
+    register_installed_file "$DESTDIR$desktopdir/mimeinfo.cache"
 
     pkg="mxtools-0.0-0";
     mkdir -p "$DESTDIR$usr_prefix/share/bee/$pkg"