diff --git a/panda/src/display/get_x11.h b/panda/src/display/get_x11.h
index 7ea150a963..e950b6c6b9 100644
--- a/panda/src/display/get_x11.h
+++ b/panda/src/display/get_x11.h
@@ -63,7 +63,7 @@ struct XVisualInfo;
 #endif
 
 #ifdef HAVE_XF86DGA
-#include <X11/extensions/xf86dga.h>
+#include <X11/extensions/Xxf86dga.h>
 #endif
 
 #include "post_x11_include.h"