diff --git a/src/hb-coretext.cc b/src/hb-coretext.cc
index 86de0be..8f2483b 100644
--- a/src/hb-coretext.cc
+++ b/src/hb-coretext.cc
@@ -1222,6 +1222,9 @@
  * AAT shaper
  */
 
+HB_SHAPER_DATA_ENSURE_DEFINE(coretext_aat, face)
+HB_SHAPER_DATA_ENSURE_DEFINE(coretext_aat, font)
+
 /*
  * shaper face data
  */