diff --git a/graphics/divxcalc/Makefile b/graphics/divxcalc/Makefile
index 14cadaa02b79..93e49e60dd31 100644
--- a/graphics/divxcalc/Makefile
+++ b/graphics/divxcalc/Makefile
@@ -21,6 +21,7 @@ USE_QT_VER=	3
 USE_GMAKE=	yes
 GNU_CONFIGURE=	yes
 CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}
+CONFIGURE_ARGS=	--x-libraries=${X11BASE}/lib --x-includes=${X11BASE}/include
 PLIST_FILES=	bin/divxcalc
 
 pre-configure: