diff --git a/src/plugins/texteditor/codeassist/codeassistant.cpp b/src/plugins/texteditor/codeassist/codeassistant.cpp
index 19c117565dc..65a899a384b 100644
--- a/src/plugins/texteditor/codeassist/codeassistant.cpp
+++ b/src/plugins/texteditor/codeassist/codeassistant.cpp
@@ -34,6 +34,7 @@
 #include "iassistprocessor.h"
 #include "textdocument.h"
 #include "iassistproposal.h"
+#include "iassistproposalmodel.h"
 #include "iassistproposalwidget.h"
 #include "assistinterface.h"
 #include "assistproposalitem.h"
@@ -263,8 +264,11 @@ void CodeAssistantPrivate::requestProposal(AssistReason reason,
     case IAssistProvider::Asynchronous: {
         processor->setAsyncCompletionAvailableHandler(
             [this, processor, reason](IAssistProposal *newProposal){
-                if (m_asyncProcessor != processor)
+                if (m_asyncProcessor != processor) {
+                    delete newProposal->model();
+                    delete newProposal;
                     return;
+                }
 
                 invalidateCurrentRequestData();
                 QTC_CHECK(newProposal);