diff --git a/artiq/applets/plot_hist.py b/artiq/applets/plot_hist.py
index cfaf6a36c..54f459d91 100755
--- a/artiq/applets/plot_hist.py
+++ b/artiq/applets/plot_hist.py
@@ -32,7 +32,7 @@ class HistogramPlot(pyqtgraph.PlotWidget):
 def main():
     applet = SimpleApplet(HistogramPlot)
     applet.add_dataset("y", "Y values")
-    applet.add_dataset("x", "X values", required=False)
+    applet.add_dataset("x", "Bin boundaries", required=False)
     applet.run()
 
 if __name__ == "__main__":