diff --git a/include/llvm/ADT/SmallPtrSet.h b/include/llvm/ADT/SmallPtrSet.h
index 1ac9bbff52e..b8977fa818b 100644
--- a/include/llvm/ADT/SmallPtrSet.h
+++ b/include/llvm/ADT/SmallPtrSet.h
@@ -22,6 +22,7 @@
 #include <cstddef>
 #include <cstring>
 #include <iterator>
+#include <utility>
 
 namespace llvm {