diff --git a/interop.py b/interop.py
index e85ff47b..ce1e17db 100644
--- a/interop.py
+++ b/interop.py
@@ -215,6 +215,8 @@ def get_letters(result):
 
         if len(self._measurements) > 0:
             t = prettytable.PrettyTable()
+            if self._markdown:
+                t.set_style(prettytable.MARKDOWN)
             t.hrules = prettytable.ALL
             t.vrules = prettytable.ALL
             rows = {}