diff --git a/src/MacVim/gui_macvim.m b/src/MacVim/gui_macvim.m
index 85f2a13501..7ab8dc7d43 100644
--- a/src/MacVim/gui_macvim.m
+++ b/src/MacVim/gui_macvim.m
@@ -2260,13 +2260,19 @@ static int vimModMaskToEventModifierFlags(int mods)
     void *
 gui_macvim_add_channel(channel_T *channel, int part)
 {
+    dispatch_queue_t q =
+        dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0);
     dispatch_source_t s =
         dispatch_source_create(DISPATCH_SOURCE_TYPE_READ,
                                channel->ch_part[part].ch_fd,
                                0,
-                               dispatch_get_main_queue());
+                               q);
     dispatch_source_set_event_handler(s, ^{
-        channel_read(channel, part, "gui_macvim_add_channel");
+        dispatch_suspend(s);
+        dispatch_async(dispatch_get_main_queue(), ^{
+            channel_read(channel, part, "gui_macvim_add_channel");
+            dispatch_resume(s);
+        });
     });
     dispatch_resume(s);
     return s;