diff --git a/src/plugins/cmakeprojectmanager/fileapireader.cpp b/src/plugins/cmakeprojectmanager/fileapireader.cpp
index e3a36d64208..5592381df73 100644
--- a/src/plugins/cmakeprojectmanager/fileapireader.cpp
+++ b/src/plugins/cmakeprojectmanager/fileapireader.cpp
@@ -42,7 +42,7 @@ FileApiReader::FileApiReader()
     QObject::connect(&m_watcher,
                      &FileSystemWatcher::directoryChanged,
                      this,
-                     &FileApiReader::replyDirectoryHasChanged);
+                     &FileApiReader::handleReplyDirectoryChange);
 }
 
 FileApiReader::~FileApiReader()
@@ -410,7 +410,7 @@ void FileApiReader::cmakeFinishedState(int exitCode)
              m_lastCMakeExitCode != 0);
 }
 
-void FileApiReader::replyDirectoryHasChanged(const QString &directory) const
+void FileApiReader::handleReplyDirectoryChange(const QString &directory)
 {
     if (m_isParsing)
         return; // This has been triggered by ourselves, ignore.
@@ -422,8 +422,10 @@ void FileApiReader::replyDirectoryHasChanged(const QString &directory) const
     QTC_CHECK(!dir.needsDevice());
     QTC_ASSERT(dir.path() == directory, return);
 
-    if (m_lastReplyTimestamp.isValid() && reply.lastModified() > m_lastReplyTimestamp)
+    if (m_lastReplyTimestamp.isValid() && reply.lastModified() > m_lastReplyTimestamp) {
+        m_lastReplyTimestamp = reply.lastModified();
         emit dirty();
+    }
 }
 
 } // CMakeProjectManager::Internal
diff --git a/src/plugins/cmakeprojectmanager/fileapireader.h b/src/plugins/cmakeprojectmanager/fileapireader.h
index dca928cddc1..de56ad900d8 100644
--- a/src/plugins/cmakeprojectmanager/fileapireader.h
+++ b/src/plugins/cmakeprojectmanager/fileapireader.h
@@ -78,7 +78,7 @@ private:
     void startCMakeState(const QStringList &configurationArguments);
     void cmakeFinishedState(int exitCode);
 
-    void replyDirectoryHasChanged(const QString &directory) const;
+    void handleReplyDirectoryChange(const QString &directory);
     void makeBackupConfiguration(bool store);
 
     void writeConfigurationIntoBuildDirectory(const QStringList &configuration);