diff --git a/lib_dec/jbm_jb4sb.c b/lib_dec/jbm_jb4sb.c
index 8d45414cb79f30632a60b04cbe1ddee53802484d..d7130a7eac0d1f257eb53743e6188d0babc72d64 100644
--- a/lib_dec/jbm_jb4sb.c
+++ b/lib_dec/jbm_jb4sb.c
@@ -381,9 +381,11 @@ JB4_DATAUNIT_HANDLE JB4_AllocDataUnit(
         JB4_dropFromBuffer( h );
     }
 
+    /* LOCK JBM MEMORY SLOT BEGIN */
     --h->nFreeMemorySlots;
     dataUnit = h->freeMemorySlots[h->nFreeMemorySlots];
     h->freeMemorySlots[h->nFreeMemorySlots] = NULL;
+    /* LOCK JBM MEMORY SLOT END */
     assert( dataUnit != NULL );
 
     return dataUnit;
@@ -397,8 +399,10 @@ void JB4_FreeDataUnit(
 {
     assert( dataUnit != NULL );
     assert( h->nFreeMemorySlots < MAX_JBM_SLOTS );
+    /* LOCK JBM MEMORY SLOT BEGIN */
     h->freeMemorySlots[h->nFreeMemorySlots] = dataUnit;
     h->nFreeMemorySlots++;
+    /* LOCK JBM MEMORY SLOT END */
 
     return;
 }
diff --git a/lib_util/g192.c b/lib_util/g192.c
index d6c6ec4755dc8f3b4f07ba3990389888547a31ee..f61971ef1484dea45713df0b0e6c21200cd0d24c 100644
--- a/lib_util/g192.c
+++ b/lib_util/g192.c
@@ -494,7 +494,7 @@ G192_ERROR G192_WriteVoipFrame_short(
     uint32_t ssrc = 0;
     uint16_t rtpSequenceNumber_2 = htons( rtpSequenceNumber );
     uint32_t rtpTimeStamp_2 = htonl( rtpTimeStamp );
-    uint16_t ssrc_2 = (uint16_t) htonl( ssrc );
+    uint32_t ssrc_2 = (uint32_t) htonl( ssrc );
 
     assert( numBits <= IVAS_MAX_BITS_PER_FRAME );
 
diff --git a/readme.txt b/readme.txt
index ae1c1f947dbdd61534290578398661a59cc650b7..b79ac9f0bcf5a3464b24ee190148da7aaebd5893 100644
--- a/readme.txt
+++ b/readme.txt
@@ -150,6 +150,24 @@ executables are "IVAS_cod.exe", "IVAS_dec.exe", "IVAS_rend.exe", and
 "ISAR_post_rend.exe". All reside in the c-code main directory. 
 
 
+                       INTEGRATION AS LIBRARIES
+                       ========================
+
+While this package contains the necessary applications to execute the IVAS encoder,
+decoder, renderer and ISAR post renderer, it is envisioned that the libraries used
+would be integrated into custom applications.
+
+It should be noted that this library is not thread-safe by default. Thus, when using
+the IVAS libraries in a multi-threaded environment, proper synchronization of API
+calls is required to prevent race conditions by concurrent access to IVAS internal
+state memory, FIFO queues buffers or any other data structures. Potential mechanisms
+include e.g. mutexes, spinlocks and semaphores. The API calls are at the present not
+optimized for fine-granular locking of just critical sections. Some sensitive
+sections have thus been marked with a comment in the form /* LOCK XYZ BEGIN */ and
+/* LOCK XYZ END */ to provide guidance where code could be modified to prevent
+some potential race conditions.
+
+
                        RUNNING THE SOFTWARE
                        ====================