diff --git a/palm/syncmal/Makefile b/palm/syncmal/Makefile
index cf302b02530e..85a15622b9e6 100644
--- a/palm/syncmal/Makefile
+++ b/palm/syncmal/Makefile
@@ -22,7 +22,7 @@ USE_GMAKE=	YES
 GNU_CONFIGURE=	YES
 CONFIGURE_ENV=	GTK_CONFIG=${X11BASE}/bin/gtk12-config
 CONFIGURE_ARGS=	--with-pilot-prefix=${PREFIX} \
-		--with-plugin-prefix=${PORTSDIR}/palm/jpilot/work/jpilot-0.99 \
-		--with-mal-source=${PORTSDIR}/palm/malsync/work/malsync
+		--with-plugin-prefix=${WRKDIRPREFIX}${PORTSDIR}/palm/jpilot/work/jpilot-0.99 \
+		--with-mal-source=${WRKDIRPREFIX}${PORTSDIR}/palm/malsync/work/malsync
 
 .include <bsd.port.mk>