diff --git a/invokeai/frontend/web/src/features/regionalPrompts/store/regionalPromptsSlice.ts b/invokeai/frontend/web/src/features/regionalPrompts/store/regionalPromptsSlice.ts
index 3013048470..0e18f2c83d 100644
--- a/invokeai/frontend/web/src/features/regionalPrompts/store/regionalPromptsSlice.ts
+++ b/invokeai/frontend/web/src/features/regionalPrompts/store/regionalPromptsSlice.ts
@@ -109,7 +109,7 @@ export const regionalPromptsSlice = createSlice({
             y: 0,
             autoNegative: 'invert',
             needsPixelBbox: false,
-            positivePrompt: null,
+            positivePrompt: '',
             negativePrompt: null,
             ipAdapterIds: [],
           };