diff --git a/debian/rules b/debian/rules
index c36c7a4..faf8963 100755
--- a/debian/rules
+++ b/debian/rules
@@ -2,6 +2,7 @@
 
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed -Wl,--no-undefined
+export DEB_CPPFLAGS_MAINT_APPEND = -DBUILD_DATE="\"$(shell date --utc --date=@${SOURCE_DATE_EPOCH} +%Y-%m-%d)\""
 
 %:
 	dh $@