diff --git a/lib/bundler/cli/pristine.rb b/lib/bundler/cli/pristine.rb
index 532b3e0b5bb..4a411a83fc7 100644
--- a/lib/bundler/cli/pristine.rb
+++ b/lib/bundler/cli/pristine.rb
@@ -33,7 +33,7 @@ def run
           if extension_cache_path = source.extension_cache_path(spec)
             FileUtils.rm_rf extension_cache_path
           end
-          FileUtils.rm_rf spec.extension_dir
+          FileUtils.rm_rf spec.extension_dir if spec.respond_to?(:extension_dir)
           FileUtils.rm_rf spec.full_gem_path
         else
           Bundler.ui.warn("Cannot pristine #{gem_name}. Gem is sourced from local path.")