diff --git a/core/src/wrapper/ConfAdapter.cpp b/core/src/wrapper/ConfAdapter.cpp
index a27bceecbbbf67d5aec6ce5def13356c2e071477..4ac8e22f52ed2f14f71ff1c315ef4ceb9df683a6 100644
--- a/core/src/wrapper/ConfAdapter.cpp
+++ b/core/src/wrapper/ConfAdapter.cpp
@@ -109,7 +109,7 @@ IVFSQConfAdapter::Match(const TempMetaConf& metaconf) {
     conf->nlist = MatchNlist(metaconf.size, metaconf.nlist);
     conf->d = metaconf.dim;
     conf->metric_type = metaconf.metric_type;
-    conf->gpu_id = metaconf->gpu_id;
+    conf->gpu_id = metaconf.gpu_id;
     conf->nbits = 8;
     MatchBase(conf);
     return conf;