diff --git a/include/swift/Runtime/PrebuiltStringMap.h b/include/swift/Runtime/PrebuiltStringMap.h
index 7051924ed6fbe..320970b01f206 100644
--- a/include/swift/Runtime/PrebuiltStringMap.h
+++ b/include/swift/Runtime/PrebuiltStringMap.h
@@ -18,6 +18,7 @@
 #include <cstdint>
 #include <cstring>
 #include <optional>
+#include <utility>
 
 namespace swift {