diff --git a/src/plugins/cmakeprojectmanager/fileapidataextractor.cpp b/src/plugins/cmakeprojectmanager/fileapidataextractor.cpp
index 81316f033bf..b98c38d2294 100644
--- a/src/plugins/cmakeprojectmanager/fileapidataextractor.cpp
+++ b/src/plugins/cmakeprojectmanager/fileapidataextractor.cpp
@@ -456,7 +456,7 @@ void addCompileGroups(ProjectNode *targetRoot,
         if (sourcePath.isChildOf(buildDirectory) && !inSourceBuild) {
             buildFileNodes.emplace_back(std::move(node));
         } else if (sourcePath.isChildOf(sourceDirectory)) {
-            sourceGroupNodes[si.sourceGroup]->addNode(std::move(node));
+            sourceGroupNodes[si.sourceGroup]->addNestedNode(std::move(node));
         } else {
             otherFileNodes.emplace_back(std::move(node));
         }