diff --git a/src/tag.c b/src/tag.c
index e780b3c30396acb2bc89f001c44e59a9776d23b6..95a90d4078758b7a92d3279154e71cd0319e11a9 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -755,7 +755,7 @@ do_tag(tag, type, count, forceit, verbose)
 		/*
 		 * Ask to select a tag from the list.
 		 */
-		i = prompt_for_number();
+		i = prompt_for_number(NULL);
 		if (i <= 0 || i > num_matches || got_int)
 		{
 		    /* no valid choice: don't change anything */