diff --git a/src/libs/clangsupport/filesystem.cpp b/src/libs/clangsupport/filesystem.cpp
index 5b8c037f80e..db79ddda312 100644
--- a/src/libs/clangsupport/filesystem.cpp
+++ b/src/libs/clangsupport/filesystem.cpp
@@ -55,7 +55,10 @@ long long FileSystem::lastModified(FilePathId filePathId) const
 
     fileInfo.refresh();
 
-    return fileInfo.lastModified().toMSecsSinceEpoch() / 1000;
+    if (fileInfo.exists())
+        return fileInfo.lastModified().toMSecsSinceEpoch() / 1000;
+
+    return 0;
 }
 
 } // namespace ClangBackEnd