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-rw-r--r--libio/iopopen.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libio/iopopen.c b/libio/iopopen.c
index ca2a18edac..dc1e74d3eb 100644
--- a/libio/iopopen.c
+++ b/libio/iopopen.c
@@ -152,14 +152,18 @@ DEFUN(_IO_popen, (command, mode),
struct locked_FILE
{
struct _IO_proc_file fpx;
+#ifdef _IO_MTSAFE_IO
_IO_lock_t lock;
+#endif
} *new_f;
_IO_FILE *fp;
new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
if (new_f == NULL)
return NULL;
+#ifdef _IO_MTSAFE_IO
new_f->fpx.file.file._lock = &new_f->lock;
+#endif
fp = (_IO_FILE*)&new_f->fpx;
_IO_init(fp, 0);
_IO_JUMPS(fp) = &_IO_proc_jumps;