diff --git a/docs/changelog.txt b/docs/changelog.txt
index 3c1ed7e8f..0080ab9c3 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -36,6 +36,7 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 ## New Plugins
 
 ## Fixes
+- `buildingplan`: fixed size limit calculations for rollers
 
 ## Misc Improvements
 - `buildingplan`: planner panel is minimized by default and now remembers minimized state
diff --git a/plugins/lua/buildingplan/planneroverlay.lua b/plugins/lua/buildingplan/planneroverlay.lua
index 83a58ebd8..803e9ae99 100644
--- a/plugins/lua/buildingplan/planneroverlay.lua
+++ b/plugins/lua/buildingplan/planneroverlay.lua
@@ -34,9 +34,10 @@ local function get_selection_size_limits()
             or btype == df.building_type.RoadPaved
             or btype == df.building_type.RoadDirt then
         return {w=31, h=31}
-    elseif btype == df.building_type.AxleHorizontal
-            or btype == df.building_type.Rollers then
+    elseif btype == df.building_type.AxleHorizontal then
         return uibs.direction == 1 and {w=1, h=31} or {w=31, h=1}
+    elseif btype == df.building_type.Rollers then
+        return (uibs.direction == 1 or uibs.direction == 3) and {w=31, h=1} or {w=1, h=31}
     end
 end