diff --git a/bilby/core/result.py b/bilby/core/result.py
index 4bff8e46186c6405013ebc11aa9bcde248745396..077fa8b4c805683cb7ad0643502bfb81f8956808 100644
--- a/bilby/core/result.py
+++ b/bilby/core/result.py
@@ -1074,7 +1074,15 @@ class Result(object):
 
         # Create the data array to plot and pass everything to corner
         xs = self.posterior[plot_parameter_keys].values
-        fig = corner.corner(xs, **kwargs)
+        if len(plot_parameter_keys) > 1:
+            fig = corner.corner(xs, **kwargs)
+        else:
+            ax = kwargs.get("ax", plt.subplot())
+            ax.hist(xs, bins=kwargs["bins"], color=kwargs["color"],
+                    histtype="step", **kwargs["hist_kwargs"])
+            ax.set_xlabel(kwargs["labels"][0])
+            fig = plt.gcf()
+
         axes = fig.get_axes()
 
         #  Add the titles