diff --git a/clients/simple-egl.c b/clients/simple-egl.c
index 54dfe936..4eeba021 100644
--- a/clients/simple-egl.c
+++ b/clients/simple-egl.c
@@ -38,6 +38,8 @@
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
+#include <src/weston-egl-ext.h>
+
 #ifndef EGL_EXT_swap_buffers_with_damage
 #define EGL_EXT_swap_buffers_with_damage 1
 typedef EGLBoolean (EGLAPIENTRYP PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC)(EGLDisplay dpy, EGLSurface surface, EGLint *rects, EGLint n_rects);