diff --git a/pattern2.cpp b/pattern2.cpp
index 7853fa16..66634b66 100644
--- a/pattern2.cpp
+++ b/pattern2.cpp
@@ -960,6 +960,17 @@ int pattern_threecolor(cell *c) {
     }
   if(S7 == 4 && S3 == 3) {
     int codesN[6] = {0,1,2,1,2,0};
+    if(whirl::whirl) {
+      auto li = whirl::get_local_info(c);
+      int sp = (MODFIXER + li.relative.first + 2 * li.relative.second) % 3;
+      if(sp != 0) {
+        if(li.last_dir & 1) 
+          sp = 3 - sp;
+        if(among(c->master->fiftyval, 1, 3, 5))
+          sp = 3 - sp;
+        }
+      return sp;
+      }
     if(nonbitrunc) 
       return codesN[c->master->fiftyval];
     if(ctof(c))