diff --git a/cmake/CoinCMakeUtilities.cmake b/cmake/CoinCMakeUtilities.cmake
index fa557ce..b09186e 100644
--- a/cmake/CoinCMakeUtilities.cmake
+++ b/cmake/CoinCMakeUtilities.cmake
@@ -16,8 +16,10 @@ macro(coin_setup_gui_project)
     set(WINWIDGET HWND)
   elseif(Gui STREQUAL "Wx")
     set(WINWIDGET wxWindow*)
+  elseif(Gui STREQUAL "Fl")
+    set(WINWIDGET Fl_Widget*)
   else()
-    message(FATAL_ERROR "Only Qt, Win, Wx and Xt supported: please set Gui to one of these values")
+    message(FATAL_ERROR "Only Qt, Win, Wx, Fl and Xt supported: please set Gui to one of these values")
   endif()
   string(TOUPPER ${Gui} GUI)
   # ############################################################################