diff --git a/io.cpp b/io.cpp
index 42c55f9fe..33045bcf4 100644
--- a/io.cpp
+++ b/io.cpp
@@ -67,12 +67,14 @@ void io_data_t::print() const
         case IO_BUFFER:
             fprintf(stderr, "buffer %p (size %lu)\n", out_buffer_ptr(), out_buffer_size());
             break;
-        case IO_CLOSE:
-            fprintf(stderr, "close %d\n", fd);
-            break;
     }
 }
 
+void io_close_t::print() const
+{
+    fprintf(stderr, "close %d\n", fd);
+}
+
 void io_buffer_read(io_data_t *d)
 {
     exec_close(d->param1.pipe_fd[1]);
diff --git a/io.h b/io.h
index da47abe07..d7ddbd0ec 100644
--- a/io.h
+++ b/io.h
@@ -116,6 +116,17 @@ public:
     }
 };
 
+class io_close_t : public io_data_t
+{
+public:
+    io_close_t(int f) :
+        io_data_t(IO_CLOSE, f)
+    {
+    }
+
+    virtual void print() const;
+};
+
 class io_chain_t : public std::vector<shared_ptr<io_data_t> >
 {
 public:
diff --git a/parser.cpp b/parser.cpp
index 14ad25c92..1c5f330b2 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -1601,7 +1601,7 @@ void parser_t::parse_job_argument_list(process_t *p,
                             {
                                 if (target == L"-")
                                 {
-                                    new_io.reset(new io_data_t(IO_CLOSE, fd));
+                                    new_io.reset(new io_close_t(fd));
                                 }
                                 else
                                 {