Index: clangd/GlobalCompilationDatabase.cpp
===================================================================
--- clangd/GlobalCompilationDatabase.cpp
+++ clangd/GlobalCompilationDatabase.cpp
@@ -86,6 +86,8 @@
     return CachedIt->second.get();
   std::string Error = "";
   auto CDB = tooling::CompilationDatabase::loadFromDirectory(Dir, Error);
+  if (CDB)
+    CDB = tooling::inferMissingCompileCommands(std::move(CDB));
   auto Result = CDB.get();
   CompilationDatabases.insert(std::make_pair(Dir, std::move(CDB)));
   return Result;