diff --git a/graphics/azpainterb/Makefile b/graphics/azpainterb/Makefile
index e8c40d0e649c..3c78d0d95c05 100644
--- a/graphics/azpainterb/Makefile
+++ b/graphics/azpainterb/Makefile
@@ -17,7 +17,7 @@ USES=		compiler:c11 desktop-file-utils gmake jpeg pkgconfig \
 		tar:xz xorg
 USE_XORG=	x11 xext xi
 HAS_CONFIGURE=	yes
-CONFIGURE_ARGS=	--docdir="${DOCSDIR}" CC="${CC}"
+CONFIGURE_ARGS=	--docdir="${DOCSDIR}" CC="${CC}" LIBS="-lz"
 
 PORTDOCS=	AUTHORS ChangeLog ReadMe_en ReadMe_ja manual_ja.html