diff --git a/lib/bootstrap.js b/lib/bootstrap.js
index 7405e72d..c77e7ade 100644
--- a/lib/bootstrap.js
+++ b/lib/bootstrap.js
@@ -111,7 +111,12 @@ var Base = this.Base = new function() {
 							return val.valueOf();
 						}
 					}
-					if (beans && (bean = name.match(/^(get|is)(([A-Z])(.*))$/)))
+					// Only add getter beans if they do not expect arguments
+					// Functions that should function both with optional
+					// arguments and as beans should not declare the parameters
+					// and use the arguments array internally instead.
+					if (beans && val.length == 0
+							&& (bean = name.match(/^(get|is)(([A-Z])(.*))$/)))
 						beans.push([ bean[3].toLowerCase() + bean[4], bean[2] ]);
 				}
 				if (!res || func || !res.get && !res.set)