diff --git a/helloRay.cpp b/helloRay.cpp
index 0ba8938..463f3b0 100644
--- a/helloRay.cpp
+++ b/helloRay.cpp
@@ -9,6 +9,9 @@
 /* ^ Before including raycastlib, this has to be set to the name of the
      function that will render pixels. It allows super performance. */
 
+#define RCL_COMPUTE_WALL_TEXCOORDS 0
+/* ^ We won't be using textures, so turn them off. */
+
 /* There are many other options that can be defined here, check the library
    for details. Don't forget to disable the features you won't be using - it
    will speed up the rendering. */