Index: trunk/src/gfx/debug_draw.cc
===================================================================
--- trunk/src/gfx/debug_draw.cc	(revision 503)
+++ trunk/src/gfx/debug_draw.cc	(revision 504)
@@ -11,8 +11,8 @@
 
 static const char *nv_debug_draw_vertex_shader = R"(
-#version 120
-attribute vec3 nv_position;
-attribute vec3 nv_color;
-varying vec3 v_color;
+#version 330
+in vec3 nv_position;
+in vec3 nv_color;
+out vec3 v_color;
 uniform mat4 nv_m_mvp;
 void main(void)
@@ -23,6 +23,6 @@
 )";
 static const char *nv_debug_draw_fragment_shader = R"(
-#version 120
-varying vec3 v_color;
+#version 330
+in  vec3 v_color;
 out vec4 o_frag_color;
 void main(void)