diff --git a/core/config.mk b/core/config.mk
index cb080763afc..2ef220f3290 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -968,8 +968,10 @@ ifeq ($(PRODUCT_USE_DYNAMIC_PARTITION_SIZE),true)
 
 ifneq ($(BOARD_SYSTEMIMAGE_PARTITION_SIZE),)
 ifneq ($(BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE),)
-$(error Should not define BOARD_SYSTEMIMAGE_PARTITION_SIZE and \
-    BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE together)
+BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE :=
+$(warning Should not define BOARD_SYSTEMIMAGE_PARTITION_SIZE and \
+    BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE together, \
+    ignored! Using BOARD_SYSTEMIMAGE_PARTITION_SIZE instead)
 endif
 endif