diff --git a/src/clang_tu.hh b/src/clang_tu.hh
index cba38e56..b3288eb7 100644
--- a/src/clang_tu.hh
+++ b/src/clang_tu.hh
@@ -21,6 +21,11 @@ namespace vfs = clang::vfs;
 #define isAsciiIdentifierContinue isIdentifierBody
 #endif
 
+#if LLVM_VERSION_MAJOR >= 19
+#define startswith starts_with
+#define endswith ends_with
+#endif
+
 namespace ccls {
 #if LLVM_VERSION_MAJOR < 19
 std::string pathFromFileEntry(const clang::FileEntry &file);
diff --git a/src/indexer.hh b/src/indexer.hh
index 11e7133b..723cda8b 100644
--- a/src/indexer.hh
+++ b/src/indexer.hh
@@ -18,6 +18,11 @@
 #include <unordered_map>
 #include <vector>
 
+#if LLVM_VERSION_MAJOR >= 19
+#define startswith starts_with
+#define endswith ends_with
+#endif
+
 namespace std {
 template <> struct hash<clang::FileID> {
   std::size_t operator()(clang::FileID fid) const { return fid.getHashValue(); }