diff --git a/src/mainboard/google/guybrush/Makefile.inc b/src/mainboard/google/guybrush/Makefile.inc
index 6a4eb5d2d7..732ca8ff72 100644
--- a/src/mainboard/google/guybrush/Makefile.inc
+++ b/src/mainboard/google/guybrush/Makefile.inc
@@ -2,6 +2,14 @@
 
 bootblock-y += bootblock.c
 
+ifneq ($(wildcard $(MAINBOARD_BLOBS_DIR)/APCB_CZN_D4.bin),)
+$(info APCB sources present.)
+APCB_SOURCES = $(MAINBOARD_BLOBS_DIR)/APCB_CZN_D4.bin
+APCB_SOURCES_RECOVERY = $(MAINBOARD_BLOBS_DIR)/APCB_CZN_D4.bin
+else
+$(info APCB sources not found.  Skipping APCB.)
+endif
+
 ramstage-y += mainboard.c
 ramstage-y += ec.c
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c