diff --git a/NEWS b/NEWS
index 5bf184e8d..457105070 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,7 @@
 v1.3.1
+perf: substantially decreased memory usage in Multi-threading mode, thanks to reports by Tino Reichardt
 build: fix Visual compilation for non x86/x64 targets, reported by Greg Slazinski (#718)
-API exp : breaking change : ZSTD_getframeHeader() 
+API exp : breaking change : ZSTD_getframeHeader() provides more information
 
 v1.3.0
 cli : new : `--list` command, by Paul Cruz
diff --git a/lib/compress/zstdmt_compress.c b/lib/compress/zstdmt_compress.c
index 3fdfe9e14..677e96f08 100644
--- a/lib/compress/zstdmt_compress.c
+++ b/lib/compress/zstdmt_compress.c
@@ -93,7 +93,7 @@ typedef struct ZSTDMT_bufferPool_s {
 
 static ZSTDMT_bufferPool* ZSTDMT_createBufferPool(unsigned nbThreads, ZSTD_customMem cMem)
 {
-    unsigned const maxNbBuffers = 2*nbThreads + 2;
+    unsigned const maxNbBuffers = 2*nbThreads + 3;
     ZSTDMT_bufferPool* const bufPool = (ZSTDMT_bufferPool*)ZSTD_calloc(
         sizeof(ZSTDMT_bufferPool) + (maxNbBuffers-1) * sizeof(buffer_t), cMem);
     if (bufPool==NULL) return NULL;