1 files changed, 1 insertions, 0 deletions
diff --git a/amount.h b/amount.h
index dfe8d2df..3df04c1d 100644
--- a/amount.h
+++ b/amount.h
@@ -4,6 +4,7 @@
 #include <map>
 #include <stack>
 #include <string>
+#include <memory>
 #include <cctype>
 #include <iostream>
 #include <sstream>