diff --git a/src/query/src/tdigest.c b/src/query/src/tdigest.c
index dde724b2e046288d14d57b330e3205f4fdbfda2c..2b0f0604bb0737b8789538579db7248dae4c24e7 100644
--- a/src/query/src/tdigest.c
+++ b/src/query/src/tdigest.c
@@ -60,7 +60,7 @@ TDigest *tdigestNewFrom(void* pBuf, int compression) {
 
     t->compression = compression;
     t->size = (long long)GET_CENTROID(compression);
-    t->threshold = GET_THRESHOLD(compression);
+    t->threshold = (int)GET_THRESHOLD(compression);
     t->min = INFINITY;
     return t;
 }