diff --git a/src/plugins/cppeditor/cpprefactoringchanges.cpp b/src/plugins/cppeditor/cpprefactoringchanges.cpp
index bb34174d06a..f27c0ce83c4 100644
--- a/src/plugins/cppeditor/cpprefactoringchanges.cpp
+++ b/src/plugins/cppeditor/cpprefactoringchanges.cpp
@@ -124,6 +124,9 @@ bool CppRefactoringFile::isCursorOn(unsigned tokenIndex) const
 
 bool CppRefactoringFile::isCursorOn(const AST *ast) const
 {
+    if (!ast)
+        return false;
+
     QTextCursor tc = cursor();
     int cursorBegin = tc.selectionStart();