diff --git a/src/cc/error.h b/src/cc/error.h
index c1d80ab..f6a3e6d 100644
--- a/src/cc/error.h
+++ b/src/cc/error.h
@@ -28,6 +28,7 @@
 #include <boost/exception/get_error_info.hpp>
 #include <boost/exception/errinfo_errno.hpp>
 #include <boost/tuple/tuple.hpp>
+#include <iostream>
 #include <cerrno>
 
 namespace cc
diff --git a/src/cc/input.h b/src/cc/input.h
index 98c334b..523e9fe 100644
--- a/src/cc/input.h
+++ b/src/cc/input.h
@@ -23,6 +23,7 @@
 
 #include <ccinternal>
 
+#include <iostream>
 #include <istream>
 #include <sstream>
 
diff --git a/src/cc/log.h b/src/cc/log.h
index 2b2c986..aaf3b32 100644
--- a/src/cc/log.h
+++ b/src/cc/log.h
@@ -25,6 +25,7 @@
 
 #include <boost/iostreams/filtering_stream.hpp>
 #include <boost/filesystem.hpp>
+#include <iostream>
 #include <fstream>
 
 #include <ccerror>
diff --git a/src/cc/options.h b/src/cc/options.h
index 6c45ce8..6a7e40c 100644
--- a/src/cc/options.h
+++ b/src/cc/options.h
@@ -37,6 +37,7 @@
 #include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
 #include <boost/format.hpp>
+#include <iostream>
 #include <fstream>
 
 #include <ccerror>
diff --git a/src/cc/sig.h b/src/cc/sig.h
index 56de768..cca23ad 100644
--- a/src/cc/sig.h
+++ b/src/cc/sig.h
@@ -26,6 +26,7 @@
 #include <sys/ioctl.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <iostream>
 #include <csignal>
 #include <cstdio>