diff --git a/src/rcldb/rcldb.cpp b/src/rcldb/rcldb.cpp
index 2b118fad..159f92ee 100644
--- a/src/rcldb/rcldb.cpp
+++ b/src/rcldb/rcldb.cpp
@@ -1106,6 +1106,8 @@ class TextSplitDb : public TextSplitP {
     void setTraits(const FieldTraits& ftp) 
     {
         ft = ftp;
+        if (!ft.pfx.empty())
+            ft.pfx = wrap_prefix(ft.pfx);
     }
 
     friend class TermProcIdx;