--- a/mfbt/TypeTraits.h
+++ b/mfbt/TypeTraits.h
@@ -8,18 +8,18 @@
 #define mozilla_TypeTraits_h_
 
 namespace mozilla {
 
 namespace detail {
 
 /**
  * The trickery used to implement IsBaseOf here makes it possible to use it for
- * the cases of multiple inheritence.  This code was inspired by the sample code
- * here:
+ * the cases of private and multiple inheritance.  This code was inspired by the
+ * sample code here:
  *
  * http://stackoverflow.com/questions/2910979/how-is-base-of-works
  */
 template<class Base, class Derived>
 class IsBaseOfHelper
 {
   public:
     operator Base*() const;