--- a/CMake/install.cmake
+++ b/CMake/install.cmake
@@ -127,9 +127,9 @@ INSTALL_MAN (fltk 3)
 if(FLTK_BUILD_TEST) # "OR FLTK_BUILD_GAMES" (not yet implemented)
 
   set(games_ blocks sudoku)
-  if(FLTK_BUILD_FLUID)
+  if(FLTK_BUILD_FLUID AND FLTK_FLUID_EXECUTABLE)
     list(APPEND games_ checkers)
-  endif(FLTK_BUILD_FLUID)
+  endif()
   if(FLTK_USE_GL)
     list(APPEND games_ glpuzzle)
   endif()