diff --git a/src/plugins/coreplugin/externaltool.cpp b/src/plugins/coreplugin/externaltool.cpp
index b9c68433f5a..d8e44e4ca22 100644
--- a/src/plugins/coreplugin/externaltool.cpp
+++ b/src/plugins/coreplugin/externaltool.cpp
@@ -128,6 +128,7 @@ ExternalTool &ExternalTool::operator=(const ExternalTool &other)
     m_errorHandling = other.m_errorHandling;
     m_modifiesCurrentDocument = other.m_modifiesCurrentDocument;
     m_fileName = other.m_fileName;
+    m_presetFileName = other.m_presetFileName;
     m_presetTool = other.m_presetTool;
     return *this;
 }