diff --git a/scheme/libs/libs-interfaces.scm b/scheme/libs/libs-interfaces.scm
index 697d891..57abf6f 100644
--- a/scheme/libs/libs-interfaces.scm
+++ b/scheme/libs/libs-interfaces.scm
@@ -25,6 +25,7 @@
    scx-xft-draw-create-bitmap
    scx-xft-draw-change
    scx-xft-text-extents-8bit
+   scx-xft-draw-string-8bit
    scx-xft-draw-rect
    scx-xft-draw-set-clip
    scx-xft-objectset-add