diff --git a/src/hnswbuild.c b/src/hnswbuild.c
index 9287b41..a9c737c 100644
--- a/src/hnswbuild.c
+++ b/src/hnswbuild.c
@@ -436,7 +436,7 @@ InsertTupleInMemory(HnswBuildState * buildstate, HnswElement element)
 	int			m = buildstate->m;
 	char	   *base = buildstate->hnswarea;
 
-	/* Wait if another process needs exclusive lock */
+	/* Wait if another process needs exclusive lock on entry lock */
 	LWLockAcquire(entryWaitLock, LW_EXCLUSIVE);
 	LWLockRelease(entryWaitLock);