1 files changed, 1 insertions, 0 deletions

diff --git a/amount.h b/amount.h
index dd8ff335..ed1c9bb5 100644
--- a/amount.h
+++ b/amount.h
@@ -6,6 +6,7 @@
 #include <ctime>
 #include <cctype>
 #include <iostream>
+#include <sstream>
 #include <cassert>
 #include <exception>