diff --git a/Makefile b/Makefile
index 5a0ef18668..c21729cf52 100644
--- a/Makefile
+++ b/Makefile
@@ -1870,6 +1870,7 @@ define filechk_timestamp.h
 			LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_TZ "%z"'; \
 			LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \
 			LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \
+			LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_EPOCH %s'; \
 		else \
 			return 42; \
 		fi; \
@@ -1879,6 +1880,7 @@ define filechk_timestamp.h
 		LC_ALL=C date +'#define U_BOOT_TZ "%z"'; \
 		LC_ALL=C date +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \
 		LC_ALL=C date +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \
+		LC_ALL=C date +'#define U_BOOT_EPOCH %s'; \
 	fi)
 endef