diff --git a/clang-tools-extra/include-fixer/find-all-symbols/HeaderMapCollector.h b/clang-tools-extra/include-fixer/find-all-symbols/HeaderMapCollector.h
index d231b8fde1f0..ecbd25f8329b 100644
--- a/clang-tools-extra/include-fixer/find-all-symbols/HeaderMapCollector.h
+++ b/clang-tools-extra/include-fixer/find-all-symbols/HeaderMapCollector.h
@@ -13,6 +13,7 @@
 #include "llvm/ADT/StringMap.h"
 #include "llvm/Support/Regex.h"
 #include <string>
+#include <vector>
 
 namespace clang {
 namespace find_all_symbols {