diff --git a/mlair/plotting/postprocessing_plotting.py b/mlair/plotting/postprocessing_plotting.py
index 8ed634b657fb365606deb5acbb819d1a9a5ba3d3..7080a6b6472716c60996e462887d0feaf1a6a9ba 100644
--- a/mlair/plotting/postprocessing_plotting.py
+++ b/mlair/plotting/postprocessing_plotting.py
@@ -1055,7 +1055,7 @@ class PlotSampleUncertaintyFromBootstrap(AbstractPlotClass):
             ax.set_ylabel(f"{self.error_measure} (in {self.error_unit})")
             ax.set_xticklabels(ax.get_xticklabels(), rotation=45)
         elif orientation == "h":
-            ax.set_xlabel(f"{self.error_measure}  (in {self.error_unit})")
+            ax.set_xlabel(f"{self.error_measure} (in {self.error_unit})")
         else:
             raise ValueError(f"orientation must be `v' or `h' but is: {orientation}")
         text_box = AnchoredText(f"n={n_boots}", frameon=True, loc=4, pad=0.5)