diff --git a/source/util/src/tcompression.c b/source/util/src/tcompression.c
index da39a2423b..da67b68c1c 100644
--- a/source/util/src/tcompression.c
+++ b/source/util/src/tcompression.c
@@ -188,7 +188,7 @@ int32_t l2ComressInitImpl_zlib(char *lossyColumns, float fPrecision, double dPre
 int32_t l2CompressImpl_zlib(const char *const input, const int32_t inputSize, char *const output, int32_t outputSize,
                             const char type, int8_t lvl) {
   uLongf  dstLen = outputSize - 1;
-  int32_t ret = compress2((Bytef *)(output + 1), (uLongf *)&dstLen, (Bytef *)input, (uLong)inputSize, 9);
+  int32_t ret = compress2((Bytef *)(output + 1), (uLongf *)&dstLen, (Bytef *)input, (uLong)inputSize, lvl);
   if (ret == Z_OK) {
     output[0] = 1;
     return dstLen + 1;