diff --git a/x11/slim/slim.conf b/x11/slim/slim.conf
index ffb24ad6f..cd9d759a5 100644
--- a/x11/slim/slim.conf
+++ b/x11/slim/slim.conf
@@ -12,4 +12,8 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
+# inject proper X11 libdir because of lib64
+pkgprefix -t libx11
+var_append GCC_WRAPPER_APPEND ' ' "-L$root$( pkgprefix libdir libx11 )"
+
 register_xdm slim "Simple Login Manager for X11" "$bindir/slim -d"