diff --git a/src/plugins/clangcodemodel/clangbackendreceiver.cpp b/src/plugins/clangcodemodel/clangbackendreceiver.cpp
index bfba1329a99..39edf46c447 100644
--- a/src/plugins/clangcodemodel/clangbackendreceiver.cpp
+++ b/src/plugins/clangcodemodel/clangbackendreceiver.cpp
@@ -147,7 +147,10 @@ bool BackendReceiver::isExpectingCompletionsMessage() const
 void BackendReceiver::reset()
 {
     // Clean up waiting assist processors
-    qDeleteAll(m_assistProcessorsTable.begin(), m_assistProcessorsTable.end());
+    for (ClangCompletionAssistProcessor *processor : m_assistProcessorsTable) {
+        processor->setAsyncProposalAvailable(nullptr);
+        delete processor;
+    }
     m_assistProcessorsTable.clear();
 
     // Clean up futures for references; TODO: Remove duplication