diff --git a/src/option_manager.cc b/src/option_manager.cc
index 03a5ed9d..5f070ad8 100644
--- a/src/option_manager.cc
+++ b/src/option_manager.cc
@@ -192,7 +192,7 @@ GlobalOptions::GlobalOptions()
     declare_option<String>("shell", "sh");
     declare_option<bool>("complete_prefix", true);
     declare_option<bool>("incsearch", true);
-    declare_option<String>("ignored_files", R"(^(\..*|.*\.(o|so|a)))$)");
+    declare_option<String>("ignored_files", R"(^(\..*|.*\.(o|so|a))$)");
     declare_option<String>("filetype", "");
 }