--- b/x11-toolkits/tk87/Makefile	
+++ b/x11-toolkits/tk87/Makefile	
@@ -30,6 +30,8 @@ WRKSRC=		${PATCH_WRKSRC}/unix
 ALL_TARGET=	all
 INSTALL_TARGET=	install-strip install-libraries
 
+BUILD_DEPENDS=	zip:archivers/zip
+
 USES+=		tcl:${SHORT_TK_VER},tea xorg
 USE_LDCONFIG=	yes
 USE_XORG=	x11 xext xft xrender xscrnsaver