diff --git a/lib/compress/zstdmt_compress.c b/lib/compress/zstdmt_compress.c
index 3808861e7..157b43b7e 100644
--- a/lib/compress/zstdmt_compress.c
+++ b/lib/compress/zstdmt_compress.c
@@ -1703,12 +1703,12 @@ static void ZSTDMT_projectJob(void* opaque, unsigned jobID,
     ZSTD_pthread_mutex_lock(&job->job_mutex);
     projection->consumed = job->consumed;
     projection->cSize = job->cSize;
-    projection->dstFlushed = job->dstFlushed;
-    ZSTD_pthread_mutex_unlock(&job->job_mutex);
     projection->srcStart = job->src.start;
     projection->srcSize = job->src.size;
     projection->prefixStart = job->prefix.start;
     projection->prefixSize = job->prefix.size;
+    projection->dstFlushed = job->dstFlushed;
+    ZSTD_pthread_mutex_unlock(&job->job_mutex);
 }
 
 static void ZSTDMT_freeJobsTable(ZSTDMT_jobDescription* jobTable, U32 nbJobs, ZSTD_customMem cMem)
diff --git a/rust/src/zstdmt_compress.rs b/rust/src/zstdmt_compress.rs
index 1924a0e56..b4c920331 100644
--- a/rust/src/zstdmt_compress.rs
+++ b/rust/src/zstdmt_compress.rs
@@ -664,8 +664,8 @@ pub type ZSTDMT_bufferGetFn = unsafe extern "C" fn(*mut c_void) -> ZstdMtBuffer;
 
 /// Scalar snapshot of one C-owned job descriptor.
 ///
-/// The C adapter fills this projection while holding the descriptor mutex.
-/// Rust owns only the ring-scan decisions below; the descriptor layout,
+/// The C adapter fills the complete projection while holding the descriptor
+/// mutex. Rust owns only the ring-scan decisions below; the descriptor layout,
 /// synchronization objects, and all pointer ownership stay in C.
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]