Added missing header.

Former-commit-id: 30d5444d23
10 years ago · 894c3bb497
1 changed files with 2 additions and 0 deletions
--- a/src/storage/StateBlock.h
+++ b/src/storage/StateBlock.h
@ -1,6 +1,8 @@
 #ifndef STORM_STORAGE_BLOCK_H_
 #define STORM_STORAGE_BLOCK_H_

+#include <ostream>
+
 #include <boost/container/flat_set.hpp>
 #include <boost/container/container_fwd.hpp>