Index: clangd/ClangdUnit.cpp
===================================================================
--- clangd/ClangdUnit.cpp
+++ clangd/ClangdUnit.cpp
@@ -25,6 +25,7 @@
 #include "clang/Sema/Sema.h"
 #include "clang/Serialization/ASTWriter.h"
 #include "clang/Tooling/CompilationDatabase.h"
+#include "clang/Basic/LangOptions.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/CrashRecoveryContext.h"
@@ -345,6 +346,7 @@
     }
     // createInvocationFromCommandLine sets DisableFree.
     CI->getFrontendOpts().DisableFree = false;
+    CI->getLangOpts()->CommentOpts.ParseAllComments = true;
   }
 
   std::unique_ptr<llvm::MemoryBuffer> ContentsBuffer =
Index: clangd/CodeComplete.cpp
===================================================================
--- clangd/CodeComplete.cpp
+++ clangd/CodeComplete.cpp
@@ -22,6 +22,7 @@
 #include "SourceCode.h"
 #include "Trace.h"
 #include "index/Index.h"
+#include "clang/Basic/LangOptions.h"
 #include "clang/Format/Format.h"
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Frontend/FrontendActions.h"
@@ -706,6 +707,7 @@
     return false;
   }
   CI->getFrontendOpts().DisableFree = false;
+  CI->getLangOpts()->CommentOpts.ParseAllComments = true;
 
   std::unique_ptr<llvm::MemoryBuffer> ContentsBuffer =
       llvm::MemoryBuffer::getMemBufferCopy(Input.Contents, Input.FileName);