diff --git a/src/Network/ATC-Inputs.cxx b/src/Network/ATC-Inputs.cxx
index 37a1a09c8..4c6164928 100644
--- a/src/Network/ATC-Inputs.cxx
+++ b/src/Network/ATC-Inputs.cxx
@@ -31,6 +31,8 @@
 #  include <sys/types.h>
 #  include <sys/stat.h>
 #  include <fcntl.h>
+#  include <unistd.h>
+#  include <istream>
 #endif
 
 #include <errno.h>
diff --git a/src/Network/ATC-Outputs.cxx b/src/Network/ATC-Outputs.cxx
index 5747a58b7..bb3d265c4 100644
--- a/src/Network/ATC-Outputs.cxx
+++ b/src/Network/ATC-Outputs.cxx
@@ -31,6 +31,8 @@
 #  include <sys/types.h>
 #  include <sys/stat.h>
 #  include <fcntl.h>
+#  include <unistd.h>
+#  include <ostream>
 #endif
 
 #include <errno.h>