diff --git a/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.spec.tsx b/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.spec.tsx
index 9e1f7616c1346f..522855ba8806fa 100644
--- a/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.spec.tsx
+++ b/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.spec.tsx
@@ -908,6 +908,33 @@ describe('useWidgetBuilderState', () => {
 
       expect(result.current.state.thresholds).toBeUndefined();
     });
+
+    it('resets the legend alias when the dataset is switched', () => {
+      mockedUsedLocation.mockReturnValue(
+        LocationFixture({
+          query: {
+            dataset: WidgetType.ERRORS,
+            displayType: DisplayType.LINE,
+            legendAlias: ['test'],
+          },
+        })
+      );
+
+      const {result} = renderHook(() => useWidgetBuilderState(), {
+        wrapper: WidgetBuilderProvider,
+      });
+
+      expect(result.current.state.legendAlias).toEqual(['test']);
+
+      act(() => {
+        result.current.dispatch({
+          type: BuilderStateAction.SET_DATASET,
+          payload: WidgetType.TRANSACTIONS,
+        });
+      });
+
+      expect(result.current.state.legendAlias).toEqual([]);
+    });
   });
 
   describe('fields', () => {
diff --git a/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.tsx b/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.tsx
index 9205dc8ad13800..ee17b6ae3f5ff8 100644
--- a/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.tsx
+++ b/static/app/views/dashboards/widgetBuilder/hooks/useWidgetBuilderState.tsx
@@ -288,6 +288,7 @@ function useWidgetBuilderState(): {
 
           setThresholds(undefined);
           setQuery([config.defaultWidgetQuery.conditions]);
+          setLegendAlias([]);
           setSelectedAggregate(undefined);
           break;
         case BuilderStateAction.SET_FIELDS: