diff --git a/architecture.inc b/architecture.inc
index 24541b5..c750d04 100644
--- a/architecture.inc
+++ b/architecture.inc
@@ -71,7 +71,7 @@ merge	{
 	#if (R < 0.63)
 	  texture { T_Grnt6   scale 4 }
 	#else
-	  texture { T_Stone34 scale 3+rand(Rng2) }
+	  texture { T_Stone34 scale 3+rand(Rng1) }
 	#end
 	}
 #end		// macro