diff --git a/lib/typescript-node.rb b/lib/typescript-node.rb
index 6d37807..7d561ba 100644
--- a/lib/typescript-node.rb
+++ b/lib/typescript-node.rb
@@ -26,7 +26,7 @@ def compile_file(source_file, *tsc_options)
           output_file = File.join(output_dir, 'out.js')
           stdout, stderr, exit_status = tsc(*tsc_options, '--out', output_file, source_file)
 
-          output_js = File.exists?(output_file) ? File.read(output_file) : nil
+          output_js = File.exist?(output_file) ? File.read(output_file) : nil
           CompileResult.new(
               output_js,
               exit_status,
@@ -86,4 +86,4 @@ def check_node
   end
 end
 
-TypeScript::Node.check_node
\ No newline at end of file
+TypeScript::Node.check_node