diff --git a/docs/source/architecture.md b/docs/source/architecture.md
index f87ef584..ec27d5e1 100644
--- a/docs/source/architecture.md
+++ b/docs/source/architecture.md
@@ -118,7 +118,7 @@ a path to a repository. This might be a local path or a URL. Upon being called,
 `repo2docker` will loop through all ContentProviders and perform the following
 commands:
 
-* Run the `detect(` method on the repository path given to `repo2docker`. This
+* Run the `detect()` method on the repository path given to `repo2docker`. This
   should return `True` if the path matches what the ContentProvider is looking
   for.