diff -ru src/cairo-quartz-font.c src/cairo-quartz-font.c
--- src/cairo-quartz-font.c	2008-04-08 06:30:31.000000000 +0800
+++ src/cairo-quartz-font.c	2008-04-23 22:36:35.000000000 +0800
@@ -775,6 +775,8 @@
  *
  * Since: 1.6
  **/
+
+#if !__LP64__
 cairo_font_face_t *
 cairo_quartz_font_face_create_for_atsu_font_id (ATSUFontID font_id)
 {
@@ -792,3 +794,4 @@
 {
     return cairo_quartz_font_face_create_for_atsu_font_id (font_id);
 }
+#endif
diff -ru src/cairo-quartz.h src/cairo-quartz.h
--- src/cairo-quartz.h	2008-04-08 06:30:31.000000000 +0800
+++ src/cairo-quartz.h	2008-04-23 22:37:18.000000000 +0800
@@ -66,8 +66,10 @@
 cairo_public cairo_font_face_t *
 cairo_quartz_font_face_create_for_cgfont (CGFontRef font);
 
+#if !__LP64__
 cairo_public cairo_font_face_t *
 cairo_quartz_font_face_create_for_atsu_font_id (ATSUFontID font_id);
+#endif
 
 #endif /* CAIRO_HAS_QUARTZ_FONT */