diff --git a/lib/zstd_decompress.c b/lib/zstd_decompress.c
index 94caa0904..c4e457348 100644
--- a/lib/zstd_decompress.c
+++ b/lib/zstd_decompress.c
@@ -482,6 +482,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
                 break;
             case 3:
                 litSize = ((istart[0] & 15) << 16) + (istart[1] << 8) + istart[2];
+                if (srcSize<4) return ERROR(corruption_detected);
                 break;
             }
             if (litSize > ZSTD_BLOCKSIZE_MAX) return ERROR(corruption_detected);