diff --git a/core/Makefile b/core/Makefile
index 4f117b8..c9ad03a 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1557,7 +1557,7 @@
 ifeq ($(AB_OTA_UPDATER),true)
 	@# When using the A/B updater, include the updater config files in the zip.
 	$(hide) $(ACP) $(TOPDIR)system/update_engine/update_engine.conf $(zip_root)/META/update_engine_config.txt
-	$(hide) for part in $(UPDATE_AB_PARTITIONS); do \
+	$(hide) for part in $(AB_OTA_PARTITIONS); do \
 	  echo "$${part}" >> $(zip_root)/META/ab_partitions.txt; \
 	done
 endif