diff --git a/src/app/app.component.html b/src/app/app.component.html
index 440e771..0869250 100644
--- a/src/app/app.component.html
+++ b/src/app/app.component.html
@@ -99,7 +99,7 @@
                     <button
                         mat-flat-button
                         (click)="cfg.viewPortLocked = !cfg.viewPortLocked"
-                        [matTooltip]="cfg.viewPortLocked ? 'Lock viewBox' : 'Unlock viewBox'"
+                        [matTooltip]="cfg.viewPortLocked ? 'Unlock viewBox' : 'Lock viewBox'"
                         matTooltipPosition="right"
                     >
                         <mat-icon *ngIf="!cfg.viewPortLocked">lock_open</mat-icon>