diff --git a/aegisub/src/video_out_gl.cpp b/aegisub/src/video_out_gl.cpp
index 322c8ce6d..78e9ba7ba 100644
--- a/aegisub/src/video_out_gl.cpp
+++ b/aegisub/src/video_out_gl.cpp
@@ -38,10 +38,7 @@
 #include <wx/log.h>
 #endif
 
-#include "video_out_gl.h"
-#include "utils.h"
-#include "video_frame.h"
-
+// These must be included before local headers.
 #ifdef __APPLE__
 #include <OpenGL/GL.h>
 #include <OpenGL/glu.h>
@@ -50,6 +47,10 @@
 #include <GL/glu.h>
 #endif
 
+#include "video_out_gl.h"
+#include "utils.h"
+#include "video_frame.h"
+
 #ifndef GL_CLAMP_TO_EDGE
 #define GL_CLAMP_TO_EDGE 0x812F
 #endif