diff --git a/graphics/gts/Makefile b/graphics/gts/Makefile
index a813739fbf0e..b08f049a3214 100644
--- a/graphics/gts/Makefile
+++ b/graphics/gts/Makefile
@@ -12,6 +12,8 @@ COMMENT=	GNU Triangulated Surface Library
 
 LICENSE=	LGPL20
 
+CONFLICTS=	pcb-[0-9]*
+
 USES=		pkgconfig
 USE_GNOME=	glib20
 GNU_CONFIGURE=	yes