diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index b0a82519..a166598b 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -187,4 +187,7 @@
   PIL Image import and export improvements
 
 - Geoffrey French
-  skimage.filters.rank.windowed_histogram and plot_windowed_histogram example.
\ No newline at end of file
+  skimage.filters.rank.windowed_histogram and plot_windowed_histogram example.
+
+- Alexey Umnov
+  skimage.draw.ellipse bug fix and tests.