diff --git a/app/x11.go b/app/x11.go
index e62dc14..d6fe7b2 100644
--- a/app/x11.go
+++ b/app/x11.go
@@ -10,9 +10,6 @@
 Simple on-screen app debugging for X11. Not an officially supported
 development target for apps, as screens with mice are very different
 than screens with touch panels.
-
-On Ubuntu 14.04 'Trusty', you may have to install these libraries:
-sudo apt-get install libegl1-mesa-dev libgles2-mesa-dev libx11-dev
 */
 
 /*
diff --git a/gl/work.h b/gl/work.h
index 0a7e40c..1a090f3 100644
--- a/gl/work.h
+++ b/gl/work.h
@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 #ifdef os_linux
-#include <GLES2/gl2.h>
+#include <GLES2/gl2.h> // install on Ubuntu with: sudo apt-get install libegl1-mesa-dev libgles2-mesa-dev libx11-dev
 #endif
 #ifdef os_ios
 #include <OpenGLES/ES2/glext.h>