--- src/backends/mpv/mpv_glwidget.cpp	2018-05-04 10:15:32.000000000 +0200
+++ -	2018-05-22 22:08:57.552655817 +0200
@@ -38,6 +38,7 @@
 #include <DApplication>
 DWIDGET_USE_NAMESPACE
 
+#include <GL/gl.h>
 
 static const char* vs_blend = R"(
 attribute vec2 position;
