diff --git a/Mk/Uses/makeself.mk b/Mk/Uses/makeself.mk
index c98448e0bc82..2fe9fba2c11b 100644
--- a/Mk/Uses/makeself.mk
+++ b/Mk/Uses/makeself.mk
@@ -14,7 +14,7 @@ _INCLUDE_USES_MAKESELF_MK=	yes
 IGNORE=	Incorrect 'USES+= makeself:${makeself_ARGS}' makeself takes no arguments
 .endif
 
-EXTRACT_DEPENDS=	${UNMAKESELF_CMD}:${PORTSDIR}/archivers/unmakeself
+EXTRACT_DEPENDS+=	${UNMAKESELF_CMD}:${PORTSDIR}/archivers/unmakeself
 
 EXTRACT_CMD=	${UNMAKESELF_CMD}
 EXTRACT_BEFORE_ARGS=