diff --git a/git-add--interactive.perl b/git-add--interactive.perl
index 24bb1ab992..d3bca12611 100755
--- a/git-add--interactive.perl
+++ b/git-add--interactive.perl
@@ -58,6 +58,9 @@
 		Term::ReadKey->import;
 		$use_readkey = 1;
 	};
+	if (!$use_readkey) {
+		print STDERR "missing Term::ReadKey, disabling interactive.singlekey\n";
+	}
 	eval {
 		require Term::Cap;
 		my $termcap = Term::Cap->Tgetent;