diff --git a/target/imagebuilder/files/Makefile b/target/imagebuilder/files/Makefile
index 871a40b3a1f..3329fe70aa1 100644
--- a/target/imagebuilder/files/Makefile
+++ b/target/imagebuilder/files/Makefile
@@ -27,6 +27,7 @@ include $(INCLUDE_DIR)/rootfs.mk
 
 include $(INCLUDE_DIR)/version.mk
 export REVISION
+export SOURCE_DATE_EPOCH
 
 define Helptext
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