diff --git a/Mk/defaults.mk b/Mk/defaults.mk
index 27b77a6a7..3aa22894f 100644
--- a/Mk/defaults.mk
+++ b/Mk/defaults.mk
@@ -34,6 +34,7 @@ ARCH!=		uname -p
 
 REPLACEMENTS=	CORE_ABI \
 		CORE_ARCH \
+		CORE_COMMIT \
 		CORE_COPYRIGHT_HOLDER \
 		CORE_COPYRIGHT_WWW \
 		CORE_COPYRIGHT_YEARS \