diff --git a/plotting.py b/plotting.py
index 7ce0a7a8b1fd9f7c4639dec0f470a76c83a13762..9890cb59240cfeee618f4b912afd40c036c499c5 100644
--- a/plotting.py
+++ b/plotting.py
@@ -788,7 +788,7 @@ def plot_spill_intensity(ax, spill_data, bin_time=10e-6, *, rate=False, cumulati
             histtype='step', cumulative=cumulative, weights=weights, **plot_kwargs)
     ax.set(ylabel=label, xlabel='Extraction time / s', #xlim=(spill_data.time_offset, spill_data.time_offset+bin_time*nbins),
            )
-    if relative: ax.yaxis.set_major_formatter(mpl.ticker.PercentFormatter(1, decimals=0))
+    if relative: ax.yaxis.set_major_formatter(mpl.ticker.PercentFormatter(1))
 
 
 def plot_spill_duty_factor(ax, spill_data, counting_dt=10e-6, evaluation_dt=10e-3, *, show_poisson_limit=False, **kwargs):