diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9a4fba68..3ba760f9 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -27,7 +27,7 @@ elseif (_GLFW_X11_GLX)
                      x11_keysym2unicode.c x11_opengl.c x11_time.c x11_window.c)
 elseif (_GLFW_X11_EGL)
     set(glfw_HEADERS ${common_HEADERS} x11_egl_platform.h)
-    set(glfw_SOURCES ${common_SOURCES} x11_clipboard.c
+    set(glfw_SOURCES ${common_SOURCES} x11_clipboard.c x11_fullscreen.c
                      x11_gamma.c x11_init.c x11_input.c x11_joystick.c
                      x11_keysym2unicode.c x11_egl_opengl.c x11_time.c x11_window.c)
 endif()