diff --git a/core/src/wrapper/ConfAdapter.cpp b/core/src/wrapper/ConfAdapter.cpp
index a94fdac8b2..d706048cf2 100644
--- a/core/src/wrapper/ConfAdapter.cpp
+++ b/core/src/wrapper/ConfAdapter.cpp
@@ -18,6 +18,7 @@
 #include "wrapper/ConfAdapter.h"
 #include "knowhere/index/vector_index/helpers/IndexParameter.h"
 #include "utils/Log.h"
+#include "WrapperException.h"
 
 #include <cmath>
 #include <memory>
@@ -146,8 +147,10 @@ IVFPQConfAdapter::MatchSearch(const TempMetaConf& metaconf, const IndexType& typ
     auto conf = std::make_shared<knowhere::IVFPQCfg>();
     conf->k = metaconf.k;
 
-    if (metaconf.nprobe <= 0)
-        conf->nprobe = 16;  // hardcode here
+    if (metaconf.nprobe <= 0){
+        WRAPPER_LOG_ERROR << "The nprobe of PQ is wrong!";
+        throw WrapperException("The nprobe of PQ is wrong!");
+    }
     else
         conf->nprobe = metaconf.nprobe;
 
diff --git a/core/unittest/wrapper/test_wrapper.cpp b/core/unittest/wrapper/test_wrapper.cpp
index c12bd5ea42..025601a1cd 100644
--- a/core/unittest/wrapper/test_wrapper.cpp
+++ b/core/unittest/wrapper/test_wrapper.cpp
@@ -51,6 +51,7 @@ class KnowhereWrapperTest
         tempconf.size = nb;
         tempconf.dim = dim;
         tempconf.k = k;
+        tempconf.nprobe = 16;
 
         index_ = GetVecIndexFactory(index_type);
         conf = ParamGenerator::GetInstance().GenBuild(index_type, tempconf);