diff --git a/llvm/lib/Bytecode/Reader/Analyzer.cpp b/llvm/lib/Bytecode/Reader/Analyzer.cpp
index 4990761..0152104 100644
--- a/llvm/lib/Bytecode/Reader/Analyzer.cpp
+++ b/llvm/lib/Bytecode/Reader/Analyzer.cpp
@@ -25,6 +25,7 @@
 #include "llvm/Assembly/Writer.h"
 #include <iomanip>
 #include <sstream>
+#include <ios>
 
 using namespace llvm;