1 files changed, 3 insertions, 0 deletions
diff --git a/glass.c b/glass.c
index 3bb1e30..4113ec7 100644
--- a/glass.c
+++ b/glass.c
@@ -667,6 +667,9 @@ init(void)
 	GLuint vbo;
 	int sv;
 
+	if (!GLEW_VERSION_2_0)
+		errx(1, "Requires GL 2.0\n");
+
 	generate_rounded_rect_verts(0.2, 1.0, .02, 0.9, corner_steps,
 				    &verts, &num_verts);