1 files changed, 1 insertions, 1 deletions

diff --git a/src/process.c b/src/process.c
index ad4cf8f8546..6134d3131bc 100644
--- a/src/process.c
+++ b/src/process.c
@@ -1290,7 +1290,7 @@ list_processes_1 (query_only)
   XSETFASTINT (minspace, 1);
 
   set_buffer_internal (XBUFFER (Vstandard_output));
-  Fbuffer_disable_undo (Vstandard_output);
+  current_buffer->undo_list = Qt;
 
   current_buffer->truncate_lines = Qt;