diff --git a/Makefile b/Makefile
index ef019002e21..914b832cc68 100644
--- a/Makefile
+++ b/Makefile
@@ -335,7 +335,7 @@ TARGET_MAP      = $(OBJECT_DIR)/$(FORKNAME)_$(TARGET_NAME).map
 
 TARGET_EXST_HASH_SECTION_FILE = $(TARGET_OBJ_DIR)/exst_hash_section.bin
 
-TARGET_EF_HASH      := $(shell echo -n "$(EXTRA_FLAGS)" | openssl dgst -md5 | awk '{print $$2;}')
+TARGET_EF_HASH      := $(shell echo -n "$(EXTRA_FLAGS)" | openssl dgst -md5 -r | awk '{print $$1;}')
 TARGET_EF_HASH_FILE := $(TARGET_OBJ_DIR)/.efhash_$(TARGET_EF_HASH)
 
 CLEAN_ARTIFACTS := $(TARGET_BIN)