Kill off the build again
diff --git a/src/MacMessage.c b/src/MacMessage.c
index fba8431..81c4f98 100644
--- a/src/MacMessage.c
+++ b/src/MacMessage.c
@@ -17,6 +17,20 @@
COSE * MacRoot = NULL;
+/*! \private
+* @brief Test if a HCOSE_MAC handle is valid
+*
+* Internal function to test if a MAC message handle is valid.
+* This will start returning invalid results and cause the code to
+* crash if handles are not released before the memory that underlies them
+* is deallocated. This is an issue of a block allocator is used since
+* in that case it is common to allocate memory but never to de-allocate it
+* and just do that in a single big block.
+*
+* @param h handle to be validated
+* @returns result of check
+*/
+
bool IsValidMacHandle(HCOSE_MAC h)
{
COSE_MacMessage * p = (COSE_MacMessage *)h;
