diff --git a/include/polarssl/memory.h b/include/polarssl/memory.h
index 567a64a..6a3dab9 100644
--- a/include/polarssl/memory.h
+++ b/include/polarssl/memory.h
@@ -71,6 +71,8 @@
  *          presented buffer and does not call malloc() and free().
  *          It sets the global polarssl_malloc() and polarssl_free() pointers
  *          to its own functions.
+ *          (Provided polarssl_malloc() and polarssl_free() are thread-safe if
+ *           POLARSSL_THREADING_C is defined)
  *
  * \note    This code is not optimized and provides a straight-forward
  *          implementation of a stack-based memory allocator.
@@ -83,6 +85,11 @@
 int memory_buffer_alloc_init( unsigned char *buf, size_t len );
 
 /**
+ * \brief   Free the mutex for thread-safety and clear remaining memory
+ */
+void memory_buffer_alloc_free();
+
+/**
  * \brief   Determine when the allocator should automatically verify the state
  *          of the entire chain of headers / meta-data.
  *          (Default: MEMORY_VERIFY_NONE)