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-rw-r--r--CMake/options.cmake2
1 files changed, 1 insertions, 1 deletions
diff --git a/CMake/options.cmake b/CMake/options.cmake
index aa4936b65..7bf8f675f 100644
--- a/CMake/options.cmake
+++ b/CMake/options.cmake
@@ -403,7 +403,7 @@ set(FLTK_USE_STD 1) # always ON since FLTK 1.5.0, option will be
# find X11 libraries and headers
set(PATH_TO_XLIBS)
-if((NOT APPLE OR FLTK_BACKEND_X11) AND NOT WIN32 AND NOT FLTK_BACKEND_WAYLAND)
+if(FLTK_BACKEND_X11)
include(FindX11)
if(X11_FOUND)
set(FLTK_USE_X11 1)