diff --git a/adapter.go b/adapter.go
index bb8278d..e5944cb 100644
--- a/adapter.go
+++ b/adapter.go
@@ -173,7 +173,7 @@ func NewAdapterByEngineWithTableName(engine *xorm.Engine, tableName string, tabl
 
 func (a *Adapter) getFullTableName() string {
 	if a.tablePrefix != "" {
-		return a.tablePrefix + "_" + a.tableName
+		return a.tablePrefix + a.tableName
 	}
 	return a.tableName
 }