diff --git a/clangd/XRefs.cpp b/clangd/XRefs.cpp
index bc2c222..2c8d161 100644
--- a/clangd/XRefs.cpp
+++ b/clangd/XRefs.cpp
@@ -33,6 +33,7 @@
 #include "clang/Index/IndexDataConsumer.h"
 #include "clang/Index/IndexSymbol.h"
 #include "clang/Index/IndexingAction.h"
+#include "clang/Index/IndexingOptions.h"
 #include "clang/Index/USRGeneration.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/None.h"
diff --git a/clangd/index/FileIndex.cpp b/clangd/index/FileIndex.cpp
index 189fd77..b1e72cf 100644
--- a/clangd/index/FileIndex.cpp
+++ b/clangd/index/FileIndex.cpp
@@ -17,6 +17,7 @@
 #include "index/SymbolOrigin.h"
 #include "index/dex/Dex.h"
 #include "clang/Index/IndexingAction.h"
+#include "clang/Index/IndexingOptions.h"
 #include "clang/Lex/MacroInfo.h"
 #include "clang/Lex/Preprocessor.h"
 #include "llvm/ADT/DenseMap.h"
diff --git a/clangd/index/IndexAction.cpp b/clangd/index/IndexAction.cpp
index 1b875bd..91936c4 100644
--- a/clangd/index/IndexAction.cpp
+++ b/clangd/index/IndexAction.cpp
@@ -18,6 +18,7 @@
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Frontend/MultiplexConsumer.h"
 #include "clang/Index/IndexingAction.h"
+#include "clang/Index/IndexingOptions.h"
 #include "clang/Tooling/Tooling.h"
 #include "llvm/ADT/STLExtras.h"
 #include <functional>
diff --git a/clangd/unittests/SymbolCollectorTests.cpp b/clangd/unittests/SymbolCollectorTests.cpp
index aa5bc77..8aa4ecc 100644
--- a/clangd/unittests/SymbolCollectorTests.cpp
+++ b/clangd/unittests/SymbolCollectorTests.cpp
@@ -14,6 +14,7 @@
 #include "clang/Basic/FileSystemOptions.h"
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Index/IndexingAction.h"
+#include "clang/Index/IndexingOptions.h"
 #include "clang/Tooling/Tooling.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/STLExtras.h"