diff -r 0ea97a92fab5 -r 5c57f0e0d1ab pidgin/gtkconv.c
--- a/pidgin/gtkconv.c	Tue Jun 26 20:03:48 2007 +0000
+++ b/pidgin/gtkconv.c	Tue Jun 26 21:47:20 2007 +0000
@@ -3879,7 +3879,7 @@
 						   CHAT_USERS_ALIAS_COLUMN, &alias,
 						   -1);
 
-				if (strcmp(name, alias))
+				if (name && alias && strcmp(name, alias))
 					tab_complete_process_item(&most_matched, entered, &partial, nick_partial,
 										  &matches, FALSE, alias);
 				g_free(name);