diff --git a/src/util/skeleton-utils.js b/src/util/skeleton-utils.js
index cab518ef..1c25b85b 100644
--- a/src/util/skeleton-utils.js
+++ b/src/util/skeleton-utils.js
@@ -822,6 +822,7 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                 type: 'eaveHelpLine',
                 isStart: true,
                 pitch: wallLine.attributes.pitch,
+                planeSize: calcLinePlaneSize({ x1: p1.x, y1: p1.y, x2: p2.x, y2: p2.y }),
                 actualSize: (isDiagonal) ? calcLineActualSize2(
                   {
                     x1: p1.x,