diff --git a/llvm/include/llvm/Bitstream/BitstreamWriter.h b/llvm/include/llvm/Bitstream/BitstreamWriter.h
index 3faadf0095a675..d5593d6ea9f05f 100644
--- a/llvm/include/llvm/Bitstream/BitstreamWriter.h
+++ b/llvm/include/llvm/Bitstream/BitstreamWriter.h
@@ -21,6 +21,7 @@
 #include "llvm/Bitstream/BitCodes.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/raw_ostream.h"
+#include <algorithm>
 #include <vector>
 
 namespace llvm {