1 files changed, 4 insertions, 4 deletions

diff --git a/plugins/popen.h b/plugins/popen.h
index 1f4e413a..c2a79df0 100644
--- a/plugins/popen.h
+++ b/plugins/popen.h
@@ -9,7 +9,7 @@ int spclose (FILE *);
 RETSIGTYPE popen_timeout_alarm_handler (int);
 
 extern unsigned int timeout_interval;
-pid_t *childpid;
-int *child_stderr_array;
-FILE *child_process;
-FILE *child_stderr;
+pid_t *childpid=NULL;
+int *child_stderr_array=NULL;
+FILE *child_process=NULL;
+FILE *child_stderr=NULL;