diff --git a/core/Makefile b/core/Makefile
index eb02ff4..c5509c6 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1267,7 +1267,8 @@
 
 $(INTERNAL_OTA_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE) $(DISTTOOLS)
 	@echo "Package OTA: $@"
-	$(hide) ./build/tools/releasetools/ota_from_target_files -v \
+	$(hide) MKBOOTIMG=$(BOARD_CUSTOM_MKBOOTIMG) \
+	   ./build/tools/releasetools/ota_from_target_files -v \
 	   -p $(HOST_OUT) \
 	   -k $(KEY_CERT_PAIR) \
 	   $(BUILT_TARGET_FILES_PACKAGE) $@
@@ -1295,7 +1296,8 @@
 
 $(INTERNAL_UPDATE_PACKAGE_TARGET): $(BUILT_TARGET_FILES_PACKAGE) $(DISTTOOLS)
 	@echo "Package: $@"
-	$(hide) ./build/tools/releasetools/img_from_target_files -v \
+	$(hide) MKBOOTIMG=$(BOARD_CUSTOM_MKBOOTIMG) \
+	   ./build/tools/releasetools/img_from_target_files -v \
 	   -s $(extensions) \
 	   -p $(HOST_OUT) \
 	   $(BUILT_TARGET_FILES_PACKAGE) $@
diff --git a/core/config.mk b/core/config.mk
index 8872ea9..21e187d 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -291,7 +291,11 @@
 SIGNAPK_JAR := $(HOST_OUT_JAVA_LIBRARIES)/signapk$(COMMON_JAVA_PACKAGE_SUFFIX)
 MKBOOTFS := $(HOST_OUT_EXECUTABLES)/mkbootfs$(HOST_EXECUTABLE_SUFFIX)
 MINIGZIP := $(HOST_OUT_EXECUTABLES)/minigzip$(HOST_EXECUTABLE_SUFFIX)
+ifeq (,$(strip $(BOARD_CUSTOM_MKBOOTIMG)))
 MKBOOTIMG := $(HOST_OUT_EXECUTABLES)/mkbootimg$(HOST_EXECUTABLE_SUFFIX)
+else
+MKBOOTIMG := $(BOARD_CUSTOM_MKBOOTIMG)
+endif
 MKYAFFS2 := $(HOST_OUT_EXECUTABLES)/mkyaffs2image$(HOST_EXECUTABLE_SUFFIX)
 APICHECK := $(HOST_OUT_EXECUTABLES)/apicheck$(HOST_EXECUTABLE_SUFFIX)
 FS_GET_STATS := $(HOST_OUT_EXECUTABLES)/fs_get_stats$(HOST_EXECUTABLE_SUFFIX)