diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 516a30c963..82b115e3a2 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -671,7 +671,7 @@ export PYTHONHASHSEED = "0"
 export PERL_HASH_SEED = "0"
 export SOURCE_DATE_EPOCH ?= "${@get_source_date_epoch_value(d)}"
 # A SOURCE_DATE_EPOCH of '0' might be misinterpreted as no SDE
-export SOURCE_DATE_EPOCH_FALLBACK ??= "1302044400"
+SOURCE_DATE_EPOCH_FALLBACK ??= "1302044400"
 REPRODUCIBLE_TIMESTAMP_ROOTFS ??= "1520598896"
 
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