diff --git a/landlock.cpp b/landlock.cpp
index c2ac0a1e..52c13587 100644
--- a/landlock.cpp
+++ b/landlock.cpp
@@ -612,6 +612,7 @@ bool incompatible1(eLand l1, eLand l2) {
   if(l1 == laEFire && l2 == laWineyard) return true;
   if(l1 == laEFire && l2 == laDryForest) return true;
   if(l1 == laGraveyard && l2 == laDryForest) return true;
+  if(l1 == laGraveyard && l2 == laRuins) return true;
   if(l1 == laGraveyard && l2 == laRedRock) return true;
   if(l1 == laGraveyard && l2 == laEmerald) return true;
   if(l1 == laDeadCaves && l2 == laEmerald) return true;