diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 9cd833b..4651e26 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -167,15 +167,47 @@
  * This allows different allocators (self-implemented or provided) to be
  * provided to the platform abstraction layer.
  *
- * Enabling MBEDTLS_PLATFORM_MEMORY without the
+ * Enabling #MBEDTLS_PLATFORM_MEMORY without the
  * MBEDTLS_PLATFORM_{FREE,CALLOC}_MACROs will provide
  * "mbedtls_platform_set_calloc_free()" allowing you to set an alternative calloc() and
  * free() function pointer at runtime.
  *
- * Enabling MBEDTLS_PLATFORM_MEMORY and specifying
+ * Enabling #MBEDTLS_PLATFORM_MEMORY and specifying
  * MBEDTLS_PLATFORM_{CALLOC,FREE}_MACROs will allow you to specify the
  * alternate function at compile time.
  *
+ * An overview of how the value of mbedtls_calloc is determined:
+ *
+ * - if !MBEDTLS_PLATFORM_MEMORY
+ *     - mbedtls_calloc = calloc
+ * - if MBEDTLS_PLATFORM_MEMORY
+ *     - if (MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
+ *         - mbedtls_calloc = MBEDTLS_PLATFORM_CALLOC_MACRO
+ *     - if !(MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
+ *         - Dynamic setup via mbedtls_platform_set_calloc_free is now possible with a default value MBEDTLS_PLATFORM_STD_CALLOC.
+ *         - How is MBEDTLS_PLATFORM_STD_CALLOC handled?
+ *         - if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
+ *             - MBEDTLS_PLATFORM_STD_CALLOC is not set to anything;
+ *             - MBEDTLS_PLATFORM_STD_MEM_HDR can be included if present;
+ *         - if !MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
+ *             - if MBEDTLS_PLATFORM_STD_CALLOC is present:
+ *                 - User-defined MBEDTLS_PLATFORM_STD_CALLOC is respected;
+ *             - if !MBEDTLS_PLATFORM_STD_CALLOC:
+ *                 - MBEDTLS_PLATFORM_STD_CALLOC = calloc
+ *
+ *         - At this point the presence of MBEDTLS_PLATFORM_STD_CALLOC is checked.
+ *         - if !MBEDTLS_PLATFORM_STD_CALLOC
+ *             - MBEDTLS_PLATFORM_STD_CALLOC = uninitialized_calloc
+ *
+ *         - mbedtls_calloc = MBEDTLS_PLATFORM_STD_CALLOC.
+ *
+ * Defining MBEDTLS_PLATFORM_CALLOC_MACRO and #MBEDTLS_PLATFORM_STD_CALLOC at the same time is not possible.
+ * MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO must both be defined or undefined at the same time.
+ * #MBEDTLS_PLATFORM_STD_CALLOC and #MBEDTLS_PLATFORM_STD_FREE do not have to be defined at the same time, as, if they are used,
+ * dynamic setup of these functions is possible. See the tree above to see how are they handled in all cases.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_CALLOC always fails, returning a null pointer.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_FREE does not do anything.
+ *
  * Requires: MBEDTLS_PLATFORM_C
  *
  * Enable this layer to allow use of alternative memory allocators.
@@ -3799,53 +3831,26 @@
 /* Platform options */
 //#define MBEDTLS_PLATFORM_STD_MEM_HDR   <stdlib.h> /**< Header to include if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS is defined. Don't define if no header is needed. */
 
-/* An overview of how the value of mbedtls_calloc is determined:
- *
- * if !MBEDTLS_PLATFORM_MEMORY
- *     mbedtls_calloc = calloc
- * if MBEDTLS_PLATFORM_MEMORY
- *     if (MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
- *         mbedtls_calloc = MBEDTLS_PLATFORM_CALLOC_MACRO
- *     if !(MBEDTLS_PLATFORM_CALLOC_MACRO && MBEDTLS_PLATFORM_FREE_MACRO):
- *         Dynamic setup via mbedtls_platform_set_calloc_free is now possible with a default value MBEDTLS_PLATFORM_STD_CALLOC.
- *         How is MBEDTLS_PLATFORM_STD_CALLOC handled?
- *         if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
- *             MBEDTLS_PLATFORM_STD_CALLOC is not set to anything;
- *             MBEDTLS_PLATFORM_STD_MEM_HDR can be included if present;
- *         if !MBEDTLS_PLATFORM_NO_STD_FUNCTIONS:
- *             if MBEDTLS_PLATFORM_STD_CALLOC is present:
- *                 User-defined MBEDTLS_PLATFORM_STD_CALLOC is respected;
- *             if !MBEDTLS_PLATFORM_STD_CALLOC:
- *                 MBEDTLS_PLATFORM_STD_CALLOC = calloc
- *
- *         At this point the presence of MBEDTLS_PLATFORM_STD_CALLOC is checked.
- *         if !MBEDTLS_PLATFORM_STD_CALLOC
- *             MBEDTLS_PLATFORM_STD_CALLOC = uninitialized_calloc
- *
- *         mbedtls_calloc = MBEDTLS_PLATFORM_STD_CALLOC.
- *
- * Defining MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_STD_CALLOC at the same time is not possible.
- * MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO must both be defined or undefined at the same time.
- * MBEDTLS_PLATFORM_STD_CALLOC and MBEDTLS_PLATFORM_STD_FREE do not have to be defined at the same time, as, if they are used,
- * dynamic setup of these functions is possible. See the tree above to see how are they handled in all cases.
- */
-
 /** \def MBEDTLS_PLATFORM_STD_CALLOC
  *
- * Default allocator to use, can be undefined. See the description above for details.
+ * Default allocator to use, can be undefined.
  * It must initialize the allocated buffer memory to zeroes.
  * The size of the buffer is the product of the two parameters.
  * The calloc function returns either a null pointer or a pointer to the allocated space.
  * If the product is 0, the function may either return NULL or a valid pointer to an array of size 0 which is a valid input to the deallocation function.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_CALLOC always fails, returning a null pointer.
+ * See the description of #MBEDTLS_PLATFORM_MEMORY for more details.
  * The corresponding deallocation function is #MBEDTLS_PLATFORM_STD_FREE.
  */
 //#define MBEDTLS_PLATFORM_STD_CALLOC        calloc
 
 /** \def MBEDTLS_PLATFORM_STD_FREE
  *
- * Default free to use, can be undefined. See the description above for more details (same principles as for MBEDTLS_PLATFORM_STD_CALLOC apply).
+ * Default free to use, can be undefined.
  * NULL is a valid parameter, and the function must do nothing.
  * A non-null parameter will always be a pointer previously returned by #MBEDTLS_PLATFORM_STD_CALLOC and not yet freed.
+ * An uninitialized #MBEDTLS_PLATFORM_STD_FREE does not do anything.
+ * See the description of #MBEDTLS_PLATFORM_MEMORY for more details (same principles as for MBEDTLS_PLATFORM_STD_CALLOC apply).
  */
 //#define MBEDTLS_PLATFORM_STD_FREE            free
 //#define MBEDTLS_PLATFORM_STD_EXIT            exit /**< Default exit to use, can be undefined */