@@ -1170,10 +1170,16 @@
  * \brief An exception indicating that unlocking a mutex failed.
  */
 @interface OFMutexUnlockFailedException: OFException
 @end
 
+/**
+ * \brief An exception indicating that a mutex is still locked.
+ */
+@interface OFMutexLockedException: OFException
+@end
+
 /**
  * \brief An exception indicating that the hash has already been calculated.
  */
 @interface OFHashAlreadyCalculatedException: OFException
 @end