diff --git a/freeglut/freeglut/CMakeLists.txt b/freeglut/freeglut/CMakeLists.txt
index 190964f..71fe6c9 100644
--- a/freeglut/freeglut/CMakeLists.txt
+++ b/freeglut/freeglut/CMakeLists.txt
@@ -324,6 +324,8 @@ IF(UNIX AND NOT(ANDROID OR BLACKBERRY OR FREEGLUT_WAYLAND))
         # Needed for multi-touch:
         CHECK_INCLUDE_FILES("${X11_Xinput_INCLUDE_PATH}/X11/extensions/XInput2.h" HAVE_X11_EXTENSIONS_XINPUT2_H)
         LIST(APPEND LIBS ${X11_Xinput_LIB})
+    ELSE()
+        MESSAGE(FATAL_ERROR, "Missing X11's XInput.h (X11/extensions/XInput.h)")
     ENDIF()
 ENDIF()
 IF(ANDROID)