diff --git a/invokeai/frontend/web/src/features/controlLayers/store/canvasSlice.ts b/invokeai/frontend/web/src/features/controlLayers/store/canvasSlice.ts
index 4e0e51d6064..1736475b02e 100644
--- a/invokeai/frontend/web/src/features/controlLayers/store/canvasSlice.ts
+++ b/invokeai/frontend/web/src/features/controlLayers/store/canvasSlice.ts
@@ -482,7 +482,7 @@ export const canvasSlice = createSlice({
           opacity: 0.5,
           position: { x: 0, y: 0 },
           autoNegative: false,
-          positivePrompt: '',
+          positivePrompt: null,
           negativePrompt: null,
           ipAdapters: [],
         };