diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index 8b9860264..fe3503a97 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -651,6 +651,25 @@ function hasScaleAdjustEnlargeTarget(
   });
 }
 
+function hasScaleAdjustStructureTarget(
+  regions: NormalizedLocalEditRegion[],
+  scalePercent?: ScaleAdjustPercent | null
+) {
+  return regions.some((region) => {
+    const targetRect = getScaleAdjustTargetRect(region, scalePercent);
+    const widthFactor =
+      region.rect.width > 0 ? targetRect.width / region.rect.width : 1;
+    const heightFactor =
+      region.rect.height > 0 ? targetRect.height / region.rect.height : 1;
+    return (
+      widthFactor > 1.08 ||
+      heightFactor > 1.08 ||
+      widthFactor < 0.92 ||
+      heightFactor < 0.92
+    );
+  });
+}
+
 function expandRectWithMargins(
   rect: NormalizedLocalEditRegion["rect"],
   marginX: number,
@@ -2489,7 +2508,10 @@ async function buildScaleAdjustVisualLayoutGuideBuffer(params: {
     const shouldUseStructureLock =
       structureLockedDraft &&
       sourceRaw &&
-      (targetWidthFactor > 1.08 || targetHeightFactor > 1.08);
+      (targetWidthFactor > 1.08 ||
+        targetHeightFactor > 1.08 ||
+        targetWidthFactor < 0.92 ||
+        targetHeightFactor < 0.92);
     const structureLockedComposite = shouldUseStructureLock
       ? await buildScaleAdjustStructureLockedComposite({
           includePersonPixels:
@@ -2603,7 +2625,10 @@ async function createScaleAdjustPatchReference(params: {
   } = params;
   const workspaceRect = getScaleAdjustPatchWorkspaceRect(regions, scalePercent);
   const workspacePixelRect = rectToPixels(workspaceRect, sourceWidth, sourceHeight);
-  const structureLockedDraft = hasScaleAdjustEnlargeTarget(regions, scalePercent);
+  const structureLockedDraft = hasScaleAdjustStructureTarget(
+    regions,
+    scalePercent
+  );
   const targetDraftBuffer = await buildScaleAdjustVisualLayoutGuideBuffer({
     regions,
     scalePercent,
@@ -3696,7 +3721,8 @@ export async function POST(request: NextRequest) {
     const useScaleAdjustMarkedPhotoGuide =
       useScaleAdjustCoordinatePrompt && !useScaleAdjustVisualLayoutGuide;
     const useScaleAdjustStructureLockedPatchWorkflow =
-      isScaleAdjustOperation && hasScaleAdjustEnlargeTarget(regions, scalePercent);
+      isScaleAdjustOperation &&
+      hasScaleAdjustStructureTarget(regions, scalePercent);
     const useScaleAdjustEditMask =
       isScaleAdjustOperation &&
       !useScaleAdjustStructureLockedPatchWorkflow &&