diff --git a/python/servo/build_commands.py b/python/servo/build_commands.py
index 97ac6c07613..0d0dbc0ebcd 100644
--- a/python/servo/build_commands.py
+++ b/python/servo/build_commands.py
@@ -442,8 +442,6 @@ class MachCommands(CommandBase):
             opts += ["-v"]
         if release:
             opts += ["--release"]
-        else:
-            features += ["gecko_debug"]
 
         if features:
             opts += ["--features", ' '.join(features)]