diff --git a/src/inc_internal/maat_stat.h b/src/inc_internal/maat_stat.h
index 4a48fd2..76999e4 100644
--- a/src/inc_internal/maat_stat.h
+++ b/src/inc_internal/maat_stat.h
@@ -24,7 +24,7 @@ struct maat_stat *maat_stat_new(const char *stat_file, size_t max_thread_num,
 void maat_stat_free(struct maat_stat *stat);
 
 int maat_stat_init(struct maat_stat *stat, struct table_manager *tbl_mgr, 
-                    struct maat_garbage_bin *garbage_bin, const char *stat_inst_name);
+                    struct maat_garbage_bin *garbage_bin);
 
 void maat_stat_output(struct maat_stat *stat, long long maat_version, int perf_on);
 
diff --git a/src/maat_api.c b/src/maat_api.c
index d3add44..b1c1338 100644
--- a/src/maat_api.c
+++ b/src/maat_api.c
@@ -433,8 +433,7 @@ struct maat *maat_new(struct maat_options *opts, const char *table_info_path)
     }
 
     if (1 == maat_instance->stat_on) {
-        int ret = maat_stat_init(maat_instance->stat, maat_instance->tbl_mgr, maat_instance->garbage_bin, 
-                                 maat_instance->instance_name);
+        int ret = maat_stat_init(maat_instance->stat, maat_instance->tbl_mgr, maat_instance->garbage_bin);
         if (ret < 0) {
             log_error(maat_instance->logger, MODULE_MAAT_API,
                      "[%s:%d] maat_stat_init failed.", __FUNCTION__, __LINE__);
diff --git a/src/maat_stat.c b/src/maat_stat.c
index b89cee5..c733930 100644
--- a/src/maat_stat.c
+++ b/src/maat_stat.c
@@ -189,14 +189,14 @@ void maat_stat_free(struct maat_stat *stat)
 }
 
 int maat_stat_init(struct maat_stat *stat, struct table_manager *tbl_mgr, 
-                    struct maat_garbage_bin *garbage_bin, const char *stat_inst_name)
+                    struct maat_garbage_bin *garbage_bin)
 {
-    if (NULL == stat || NULL == tbl_mgr || NULL == garbage_bin ||
-        NULL == stat_inst_name) {
+    if (NULL == stat || NULL == tbl_mgr || NULL == garbage_bin) {
         return -1;
     }
 
-	stat->fs_handle = fieldstat_instance_new(stat_inst_name);
+    const char *instance_name = "maat_stat";
+	stat->fs_handle = fieldstat_instance_new(instance_name);
     if (NULL == stat->fs_handle) {
         log_error(stat->logger, MODULE_MAAT_STAT, "fieldstat_instance_new failed.");
         return -1;
@@ -219,7 +219,7 @@ int maat_stat_init(struct maat_stat *stat, struct table_manager *tbl_mgr,
     stat->ref_tbl_mgr = tbl_mgr;
     stat->ref_garbage_bin = garbage_bin;
     size_t n_column = sizeof(common_column_name) / sizeof(common_column_name[0]);
-    int fs_table_id = fieldstat_register_table(stat->fs_handle, stat_inst_name, 
+    int fs_table_id = fieldstat_register_table(stat->fs_handle, instance_name, 
                                                common_column_name, common_column_type, 
                                                n_column);
     if (fs_table_id < 0) {