diff --git a/src/vs/editor/browser/viewParts/viewZones/viewZones.ts b/src/vs/editor/browser/viewParts/viewZones/viewZones.ts
index 2e7cdd6515deb2ce8a5bf9c8902501fada22cfff..c14aead1c17fb7eb9e72df0a92a1625c64466af2 100644
--- a/src/vs/editor/browser/viewParts/viewZones/viewZones.ts
+++ b/src/vs/editor/browser/viewParts/viewZones/viewZones.ts
@@ -219,7 +219,7 @@ export class ViewZones extends ViewPart {
 			// TODO@Alex: change `newOrdinal` too
 
 			if (changed) {
-				zone.delegate.onComputedHeight(props.heightInPx);
+				this._safeCallOnComputedHeight(zone.delegate, props.heightInPx);
 				this.setShouldRender();
 			}
 		}