diff --git a/lib/base/stdiostream.hpp b/lib/base/stdiostream.hpp
index 05c7f0d57..b305c7f97 100644
--- a/lib/base/stdiostream.hpp
+++ b/lib/base/stdiostream.hpp
@@ -6,6 +6,7 @@
 #include "base/i2-base.hpp"
 #include "base/stream.hpp"
 #include <iosfwd>
+#include <iostream>
 
 namespace icinga {