diff --git a/plugins/gtkgui/gtkgui.py b/plugins/gtkgui/gtkgui.py
index 409e2d0c7..d699e4f50 100644
--- a/plugins/gtkgui/gtkgui.py
+++ b/plugins/gtkgui/gtkgui.py
@@ -714,7 +714,7 @@ class gc:
 			begin = txt.split()[-1]
 			for nick in list_nick:
 				if nick.find(begin) == 0:
-					txt_buffer.insert_at_cursor(nick[len(begin):])
+					txt_buffer.insert_at_cursor(nick[len(begin):] + ' ')
 					return 1
 		return 0