diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 00daa4c70..4091662a9 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -2506,11 +2506,11 @@ static void ZSTD_copyBlockSequences(ZSTD_CCtx* zc)
 
     /* Insert last literals (if any exist) in the block as a sequence with ml == off == 0 */
     lastLLSize = seqStoreLiteralsSize - literalsRead;
-    if (lastLLSize) {
+    if (lastLLSize > 0) {
         outSeqs[i].litLength = lastLLSize;
         outSeqs[i].matchLength = outSeqs[i].offset = outSeqs[i].rep = 0;
+        seqStoreSeqSize++;
     }
-    
     zc->seqCollector.seqIndex += seqStoreSeqSize;
 }
 
diff --git a/lib/zstd.h b/lib/zstd.h
index d2f20be2d..0c243e017 100644
--- a/lib/zstd.h
+++ b/lib/zstd.h
@@ -1115,23 +1115,28 @@ typedef struct ZSTD_CCtx_params_s ZSTD_CCtx_params;
 
 typedef struct {
     unsigned int offset;      /* The offset of the match.
-                               * If == 0, then represents a section of literals of litLength size
+                               * If offset == 0 and matchLength == 0,
+                               * then this sequence represents last literals in the block of litLength size.
                                */
 
-    unsigned int litLength;   /* Literal length */
-    unsigned int matchLength; /* Match length. */
+    unsigned int litLength;   /* Literal length of the sequence. */
+    unsigned int matchLength; /* Match length of the sequence. */
+
+                              /* Note: Users of this API may provide a sequence with matchLength == litLength == offset == 0.
+                               * In this case, we will treat the "sequence" as a marker for a block boundary.
+                               */
     
     unsigned int rep;         /* Represents which repeat offset is used. Ranges from [0, 3].
                                * If rep == 0, then this sequence does not contain a repeat offset.
-                               * Otherwise:
+                               * If rep > 0:
                                *  If litLength != 0:
-                               *      rep == 1 --> offset == repeat offset 1
-                               *      rep == 2 --> offset == repeat offset 2
-                               *      rep == 3 --> offset == repeat offset 3
+                               *      rep == 1 --> offset == repeat_offset_1
+                               *      rep == 2 --> offset == repeat_offset_2
+                               *      rep == 3 --> offset == repeat_offset_3
                                *  If litLength == 0:
-                               *      rep == 1 --> offset == repeat offset 2
-                               *      rep == 2 --> offset == repeat offset 3
-                               *      rep == 3 --> offset == repeat offset 1 - 1
+                               *      rep == 1 --> offset == repeat_offset_2
+                               *      rep == 2 --> offset == repeat_offset_3
+                               *      rep == 3 --> offset == repeat_offset_1 - 1
                                */
 } ZSTD_Sequence;
 
diff --git a/tests/fuzzer.c b/tests/fuzzer.c
index e54714fdf..038fae1aa 100644
--- a/tests/fuzzer.c
+++ b/tests/fuzzer.c
@@ -310,22 +310,23 @@ static void FUZ_decodeSequences(BYTE* dst, ZSTD_Sequence* seqs, size_t seqsSize,
 {
     size_t i;
     size_t j;
-    for(i = 0; i < seqsSize - 1; ++i) {
-        assert(dst + seqs[i].litLength + seqs[i].matchLength < dst + size);
-        assert(src + seqs[i].litLength + seqs[i].matchLength < src + size);
+    for(i = 0; i < seqsSize; ++i) {
+        assert(dst + seqs[i].litLength + seqs[i].matchLength <= dst + size);
+        assert(src + seqs[i].litLength + seqs[i].matchLength <= src + size);
 
         memcpy(dst, src, seqs[i].litLength);
         dst += seqs[i].litLength;
         src += seqs[i].litLength;
         size -= seqs[i].litLength;
 
-        for (j = 0; j < seqs[i].matchLength; ++j)
-            dst[j] = dst[j - seqs[i].offset];
-        dst += seqs[i].matchLength;
-        src += seqs[i].matchLength;
-        size -= seqs[i].matchLength;
+        if (seqs[i].offset != 0) {
+            for (j = 0; j < seqs[i].matchLength; ++j)
+                dst[j] = dst[j - seqs[i].offset];
+            dst += seqs[i].matchLength;
+            src += seqs[i].matchLength;
+            size -= seqs[i].matchLength;
+        }
     }
-    memcpy(dst, src, size);
 }
 
 /*=============================================
@@ -2666,6 +2667,7 @@ static int basicUnitTests(U32 const seed, double compressibility)
         ZSTD_freeCCtx(cctx);
         free(seqs);
     }
+    DISPLAYLEVEL(3, "OK \n");
 
     /* Multiple blocks of zeros test */
     #define LONGZEROSLENGTH 1000000 /* 1MB of zeros */