diff --git a/src/plugins/cmakeprojectmanager/cmakeprocess.cpp b/src/plugins/cmakeprojectmanager/cmakeprocess.cpp
index ae39d5f9182..45c820974a4 100644
--- a/src/plugins/cmakeprojectmanager/cmakeprocess.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeprocess.cpp
@@ -57,10 +57,8 @@ CMakeProcess::CMakeProcess()
 
 CMakeProcess::~CMakeProcess()
 {
-    if (m_process) {
-        m_process->disconnect();
+    if (m_process)
         Core::Reaper::reap(m_process.release());
-    }
 
     m_parser.flush();
 
diff --git a/src/plugins/coreplugin/reaper.cpp b/src/plugins/coreplugin/reaper.cpp
index fa8408abb17..c10c460e62c 100644
--- a/src/plugins/coreplugin/reaper.cpp
+++ b/src/plugins/coreplugin/reaper.cpp
@@ -157,6 +157,10 @@ void reap(QtcProcess *process, int timeoutMs)
     if (!process)
         return;
 
+    process->setStdOutCallback(nullptr);
+    process->setStdErrCallback(nullptr);
+    process->disconnect();
+
     QTC_ASSERT(Internal::d, return);
 
     new Internal::ProcessReaper(process, timeoutMs);