diff --git a/plugins/popen.h b/plugins/popen.h
--- /dev/null
+++ b/plugins/popen.h
@@ -0,0 +1,9 @@
+FILE *spopen (const char *);
+int spclose (FILE *);
+RETSIGTYPE popen_timeout_alarm_handler (int);
+
+extern int timeout_interval;
+pid_t *childpid;
+int *child_stderr_array;
+FILE *child_process;
+FILE *child_stderr;