--- src/plugins/grass/CMakeLists.txt.orig	2017-10-27 12:00:21 UTC
+++ src/plugins/grass/CMakeLists.txt
@@ -202,6 +202,7 @@ MACRO(ADD_GRASSPLUGIN GRASS_BUILD_VERSION)
       qgis_app
       qgis_gui
       ${OPENPTY_LIBRARY}
+      -lulog
     )
 
     IF (CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
