1 files changed, 2 insertions, 0 deletions
diff --git a/src/format.h b/src/format.h
index 15431cf1..48c690be 100644
--- a/src/format.h
+++ b/src/format.h
@@ -45,6 +45,8 @@
 #include "expr.h"
 #include "unistring.h"
 
+#include <boost/smart_ptr/scoped_ptr.hpp>
+
 namespace ledger {
 
 class unistring;