diff --git a/lib/warbler/traits/bundler.rb b/lib/warbler/traits/bundler.rb
index ef2330a2..d6d7a223 100644
--- a/lib/warbler/traits/bundler.rb
+++ b/lib/warbler/traits/bundler.rb
@@ -41,8 +41,16 @@ def add_bundler_gems
           # bundler gemspec from bundler/source.rb
           if spec.name == "bundler"
             full_gem_path = Pathname.new(spec.full_gem_path)
-            tries = 2
-            (full_gem_path = full_gem_path.dirname; tries -= 1) while tries > 0 && !full_gem_path.join('bundler.gemspec').exist?
+
+            while !full_gem_path.join('bundler.gemspec').exist?
+              full_gem_path = full_gem_path.dirname
+              # if at top of the path, meaning we cannot find bundler.gemspec, abort.
+              if full_gem_path.to_s=~/^[\.\/]$/
+                $stderr.puts("warning: Unable to detect bundler spec under '#{spec.full_gem_path}'' and is sub-dirs")
+                exit
+              end
+            end
+
             spec.loaded_from = full_gem_path.join('bundler.gemspec').to_s
             # RubyGems 1.8.x: @full_gem_path is cached, so we have to set it
             def spec.full_gem_path=(p); @full_gem_path = p; end