diff --git a/lib/openssl/config.rb b/lib/openssl/config.rb
index cea19ba8..191ee8e3 100644
--- a/lib/openssl/config.rb
+++ b/lib/openssl/config.rb
@@ -52,7 +52,7 @@ def parse(string)
       # Raises a ConfigError on invalid configuration data.
       def parse_config(io)
         begin
-          if(io.instance_of?(String))
+          if io.instance_of?(String)
             parse(io)
           else
             parse_config_lines(io)