diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1952d7c86..cf6424068 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -209,9 +209,6 @@ if(ENABLE_FGADMIN)
 			list(APPEND FLTK_LIBRARIES ${X11_Xft_LIB})
 		endif()
 
-		set( CMAKE_REQUIRED_INCLUDES ${FLTK_INCLUDE_DIR} )
-		set( CMAKE_REQUIRED_LIBRARIES ${FLTK_LIBRARIES} )
-
 		message(STATUS "Using FLTK_LIBRARIES for fgadmin: ${FLTK_LIBRARIES}")
 	endif ( FLTK_FOUND )
 endif(ENABLE_FGADMIN)
diff --git a/utils/fgadmin/src/CMakeLists.txt b/utils/fgadmin/src/CMakeLists.txt
index 222a4c62f..42b95d799 100644
--- a/utils/fgadmin/src/CMakeLists.txt
+++ b/utils/fgadmin/src/CMakeLists.txt
@@ -5,6 +5,8 @@ add_library(FGAdminUI ${FGAdminUI_FLTK_UI_SRCS})
 add_executable(fgadmin fgadmin_funcs.cxx main.cxx untarka.c)
 add_dependencies(fgadmin FGAdminUI)
 
+include_directories(${FLTK_INCLUDE_DIR})
+
 target_link_libraries(fgadmin FGAdminUI
 	${SIMGEAR_CORE_LIBRARIES}
 	${PLIB_LIBRARIES}