diff --git a/src/nebulae.c b/src/nebulae.c
index 4f85679..1df4f9a 100644
--- a/src/nebulae.c
+++ b/src/nebulae.c
@@ -484,7 +484,7 @@ static int nebu_generate(void) {
   int ret;
 
   /* Warn user of what is happening. */
-  loadscreen_render(0.05, "Generating Nebulae...");
+  loadscreen_render(0.05, "Generating Nebulae (slow, run once)...");
 
   /* Get resolution. */
   w = SCREEN_W;