diff --git a/piker/ui/_display.py b/piker/ui/_display.py
index ee2ba370..1b28312c 100644
--- a/piker/ui/_display.py
+++ b/piker/ui/_display.py
@@ -214,9 +214,8 @@ async def increment_history_view(
     hist_chart: ChartPlotWidget = ds.hist_chart
     hist_viz: Viz = ds.hist_viz
     # viz: Viz = ds.viz
-    # NOTE: Changed for macOS compatibility with shortened shm names
-    # assert 'hist' in hist_viz.shm.token['shm_name']
-    assert hist_viz.shm.token['shm_name'].endswith('.h')
+    # Ensure the "history" shm-buffer is what's reffed.
+    assert hist_viz.shm.token['shm_name'].endswith('.hist')
     # name: str = hist_viz.name
 
     # TODO: seems this is more reliable at keeping the slow