diff --git a/lib/cli/calistcommand.cpp b/lib/cli/calistcommand.cpp
index fff0115d0..578204c83 100644
--- a/lib/cli/calistcommand.cpp
+++ b/lib/cli/calistcommand.cpp
@@ -24,6 +24,7 @@
 #include "base/application.hpp"
 #include "base/tlsutility.hpp"
 #include "base/json.hpp"
+#include <iostream>
 
 using namespace icinga;
 namespace po = boost::program_options;
diff --git a/lib/cli/pkisavecertcommand.cpp b/lib/cli/pkisavecertcommand.cpp
index 0651feed4..a25e266d5 100644
--- a/lib/cli/pkisavecertcommand.cpp
+++ b/lib/cli/pkisavecertcommand.cpp
@@ -22,6 +22,7 @@
 #include "base/logger.hpp"
 #include "base/tlsutility.hpp"
 #include "base/console.hpp"
+#include <iostream>
 
 using namespace icinga;
 namespace po = boost::program_options;
diff --git a/lib/remote/jsonrpc.cpp b/lib/remote/jsonrpc.cpp
index 8aab9c2f7..1d3efd5ca 100644
--- a/lib/remote/jsonrpc.cpp
+++ b/lib/remote/jsonrpc.cpp
@@ -23,6 +23,7 @@
 #include "base/console.hpp"
 #include "base/scriptglobal.hpp"
 #include "base/convert.hpp"
+#include <iostream>
 
 using namespace icinga;