diff --git a/sim/state/ledmatrix.ts b/sim/state/ledmatrix.ts
index 91909b0b..403f5c8e 100644
--- a/sim/state/ledmatrix.ts
+++ b/sim/state/ledmatrix.ts
@@ -271,6 +271,7 @@ namespace pxsim.led {
 
     export function stopAnimation(): void {
         board().ledMatrixState.animationQ.cancelAll();
+        board().ledMatrixState.image.clear();
     }
 
     export function setDisplayMode(mode: DisplayMode): void {