diff --git a/src/pool/PoolObjectSQL.cc b/src/pool/PoolObjectSQL.cc
index f7c6d5715a..c00a95bd4e 100644
--- a/src/pool/PoolObjectSQL.cc
+++ b/src/pool/PoolObjectSQL.cc
@@ -280,6 +280,8 @@ int PoolObjectSQL::append_template(
         return -1;
     }
 
+    delete old_tmpl;
+
     return 0;
 }