diff --git a/src/progress.c b/src/progress.c
index 4f1f55e..29814d9 100644
--- a/src/progress.c
+++ b/src/progress.c
@@ -183,7 +183,7 @@ zenity_progress_handle_stdin (GIOChannel   *channel,
     g_string_free (string, TRUE);
   }
 
-  if (condition != G_IO_IN) {
+  if ((condition != G_IO_IN) && (condition != G_IO_IN + G_IO_HUP)) {
     /* We assume that we are done, so stop the pulsating and de-sensitize the buttons */
     GtkWidget *button;
 
diff --git a/src/tree.c b/src/tree.c
index 3861e86..7b46667 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -180,7 +180,7 @@ zenity_tree_handle_stdin (GIOChannel  *channel,
     g_string_free (string, TRUE);
   }
 
-  if (condition != G_IO_IN) {
+  if ((condition != G_IO_IN) && (condition != G_IO_IN + G_IO_HUP)) {
     g_io_channel_shutdown (channel, TRUE, NULL);
     return FALSE;
   }