diff --git a/src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp b/src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp
index c5e307cfb70..25120aea9e9 100644
--- a/src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp
@@ -272,6 +272,8 @@ bool CMakeBuildSystem::addFiles(Node *context, const FilePaths &filePaths, FileP
         const int targetDefinitionLine = target.backtrace.last().line;
 
         // Have a fresh look at the CMake file, not relying on a cached value
+        Core::DocumentManager::saveModifiedDocumentSilently(
+            Core::DocumentModel::documentForFilePath(targetCMakeFile));
         expected_str<QByteArray> fileContent = targetCMakeFile.fileContents();
         cmListFile cmakeListFile;
         std::string errorString;
@@ -397,6 +399,8 @@ CMakeBuildSystem::projectFileArgumentPosition(const QString &targetName, const Q
     const FilePath targetCMakeFile = target.backtrace.last().path;
 
     // Have a fresh look at the CMake file, not relying on a cached value
+    Core::DocumentManager::saveModifiedDocumentSilently(
+        Core::DocumentModel::documentForFilePath(targetCMakeFile));
     expected_str<QByteArray> fileContent = targetCMakeFile.fileContents();
     cmListFile cmakeListFile;
     std::string errorString;