diff --git a/Source/ChangeMapEdgeHarmony.cs b/Source/ChangeMapEdgeHarmony.cs
index 7eb8f5e..de72222 100644
--- a/Source/ChangeMapEdgeHarmony.cs
+++ b/Source/ChangeMapEdgeHarmony.cs
@@ -31,6 +31,10 @@ static ChangeMapEdgeHarmony()
             MethodInfo innozone_targetmethod = AccessTools.Method(typeof(Verse.GenGrid), "InNoZoneEdgeArea");
             HarmonyMethod innozone_postfixmethod = new HarmonyMethod(typeof(ChangeMapEdgeHarmony).GetMethod("InNoZoneEdgeArea_Postfix"));
             harmony.Patch(innozone_targetmethod, ignorefunction_prefixmethod, innozone_postfixmethod);
+
+            MethodInfo cellrect_innobuild_targetmethod = AccessTools.Method(typeof(Verse.CellRect), "InNoBuildEdgeArea");
+            HarmonyMethod cellrect_innobuild_postfixmethod = new HarmonyMethod(typeof(ChangeMapEdgeHarmony).GetMethod("CellRectInNoBuildEdgeArea_Postfix"));
+            harmony.Patch(cellrect_innobuild_targetmethod, ignorefunction_prefixmethod, cellrect_innobuild_postfixmethod);
         }
 
         static Material LineMatMetaOverlay = MaterialPool.MatFrom(GenDraw.LineTexPath, ShaderDatabase.MetaOverlay);
@@ -76,5 +80,10 @@ public static void InNoZoneEdgeArea_Postfix(this IntVec3 c, Map map, ref bool __
         {
             __result = c.CloseToEdge(map, ChangeMapEdge.Instance.GetNoZoneLimit());
         }
+        public static void CellRectInNoBuildEdgeArea_Postfix(Verse.CellRect __instance, Map map, ref bool __result)
+        {
+            int limit = ChangeMapEdge.Instance.GetNoBuildLimit();
+            __result = !__instance.IsEmpty && (__instance.minX < limit || __instance.minZ < limit || __instance.maxX >= map.Size.x - limit || __instance.maxZ >= map.Size.z - limit);
+        }
     }
 }
\ No newline at end of file
diff --git a/v1.3/Assemblies/ChangeMapEdge.dll b/v1.3/Assemblies/ChangeMapEdge.dll
index 0cd5a40..af4dc93 100644
Binary files a/v1.3/Assemblies/ChangeMapEdge.dll and b/v1.3/Assemblies/ChangeMapEdge.dll differ