diff --git a/Modules/FindFLTK.cmake b/Modules/FindFLTK.cmake
index 52ded622b..3f5362c61 100644
--- a/Modules/FindFLTK.cmake
+++ b/Modules/FindFLTK.cmake
@@ -54,7 +54,7 @@ IF(FLTK_INCLUDE_PATH)
     )
   ENDIF(USE_FLTK_VERSION_1.1)
 
-  SET( FLTK_LIBRARY $FLTK_BASE_LIBRARY $FLTK_GL_LIBRARY $FLTK_FORMS_LIBRARY )
+  SET( FLTK_LIBRARY ${FLTK_BASE_LIBRARY} ${FLTK_GL_LIBRARY} ${FLTK_FORMS_LIBRARY} )
 
 ENDIF(FLTK_INCLUDE_PATH)