diff --git a/include/llvm/Support/FileSystem.h b/include/llvm/Support/FileSystem.h
index c0b2d551d33..b57a8b07a32 100644
--- a/include/llvm/Support/FileSystem.h
+++ b/include/llvm/Support/FileSystem.h
@@ -39,6 +39,7 @@
 #include <iterator>
 #include <stack>
 #include <string>
+#include <tuple>
 #include <vector>
 
 #ifdef HAVE_SYS_STAT_H