diff --git a/core/AmMimeBody.cpp b/core/AmMimeBody.cpp
index f7dc8a4b..149990fb 100644
--- a/core/AmMimeBody.cpp
+++ b/core/AmMimeBody.cpp
@@ -119,9 +119,10 @@ void AmContentType::resetBoundary()
   while (it != params.end()) {
     Params::iterator l_it = it;
     it++;
-    if ((*l_it)->type == Param::BOUNDARY)
+    if ((*l_it)->type == Param::BOUNDARY) {
       delete *l_it;
       params.erase(l_it);
+    }
   }
 
   params.push_back(new Param(BOUNDARY_str, int2hex(get_random())));