diff --git a/PopPUNK/plot.py b/PopPUNK/plot.py
index 0d628061..faf5ac37 100644
--- a/PopPUNK/plot.py
+++ b/PopPUNK/plot.py
@@ -171,7 +171,7 @@ def plot_results(X, Y, means, covariances, scale, title, out_prefix):
         # Plot an ellipse to show the Gaussian component
         angle = np.arctan(u[1] / u[0])
         angle = 180. * angle / np.pi  # convert to degrees
-        ell = mpl.patches.Ellipse(mean*scale, v[0], v[1], 180. + angle, color=color)
+        ell = mpl.patches.Ellipse(mean*scale, v[0], v[1], angle=180. + angle, color=color)
         ell.set_clip_box(splot.bbox)
         ell.set_alpha(0.5)
         splot.add_artist(ell)