diff --git a/src/query/src/tdigest.c b/src/query/src/tdigest.c
index 93149bd0d6d4a3d0b417ab8308a64857cfbd02af..4cc7f5b6478bc25868267ea6c392b0fe74fe9202 100644
--- a/src/query/src/tdigest.c
+++ b/src/query/src/tdigest.c
@@ -51,7 +51,7 @@ void tdigestCopy(TDigest* dst, TDigest* src) {
 }
 
 TDigest *tdigestNewFrom(void* pBuf, int32_t compression) {
-    memset(pBuf, 0, TDIGEST_SIZE(compression));
+    memset(pBuf, 0, (size_t)TDIGEST_SIZE(compression));
     TDigest* t = (TDigest*)pBuf;
     
     t->centroids    = (SCentroid*)calloc((int32_t)GET_CENTROID(compression), sizeof(SCentroid));
diff --git a/src/query/tests/apercentileTest.cpp b/src/query/tests/apercentileTest.cpp
index ab03f2e390315367f97c5f11ae50b6d290bb080c..65bbbe85b0c9d65cbea33baa90d608bed63a3ae6 100644
--- a/src/query/tests/apercentileTest.cpp
+++ b/src/query/tests/apercentileTest.cpp
@@ -36,7 +36,7 @@ enum {
 
 
 void tdigest_init(TDigest **pTDigest) {
-  void *tmp = calloc(1, (int16_t)(TDIGEST_SIZE(COMPRESSION)));
+  void *tmp = calloc(1, (size_t)(TDIGEST_SIZE(COMPRESSION)));
   *pTDigest = tdigestNewFrom(tmp, COMPRESSION);
 }