lib/PublicInbox/View.pm     | 18 ++++++++++--------
 lib/PublicInbox/ViewDiff.pm | 13 +++++++++----

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 0187ec332a58faaa4c89b6bb349a5fbb07f9c5fa..41a45b0b6682a158a37c6323e492543a3d173793 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -558,15 +558,17 @@
 	return attach_link($upfx, $ct, $p, $fn) unless defined $s;
 
 	my ($diff, $spfx);
-	if ($ibx->{-repo_objs} && $s =~ /^(?:diff|---|\+{3}) /ms) {
+	if ($s =~ /^(?:diff|---|\+{3}) /ms) {
 		$diff = [];
-		my $n_slash = $upfx =~ tr!/!/!;
-		if ($n_slash == 0) {
-			$spfx = '../';
-		} elsif ($n_slash == 1) {
-			$spfx = '';
-		} else { # nslash == 2
-			$spfx = '../../';
+		if ($ibx->{-repo_objs}) {
+			my $n_slash = $upfx =~ tr!/!/!;
+			if ($n_slash == 0) {
+				$spfx = '../';
+			} elsif ($n_slash == 1) {
+				$spfx = '';
+			} else { # nslash == 2
+				$spfx = '../../';
+			}
 		}
 	};
 
diff --git a/lib/PublicInbox/ViewDiff.pm b/lib/PublicInbox/ViewDiff.pm
index 1aad2832bb392dbb650f9d839bcde026bb3cf3a7..0d1aefb78bdea037425867bc9f3366a7ed7b1fc5 100644
--- a/lib/PublicInbox/ViewDiff.pm
+++ b/lib/PublicInbox/ViewDiff.pm
@@ -40,7 +40,8 @@ 	my ($dctx, $spfx, $ca, $cb) = @_;
 	my $oid_a = $dctx->{oid_a};
 	my $oid_b = $dctx->{oid_b};
 
-	(defined($oid_a) && defined($oid_b)) or return "@@ $ca $cb @@";
+	(defined($spfx) && defined($oid_a) && defined($oid_b)) or
+		return "@@ $ca $cb @@";
 
 	my ($n) = ($ca =~ /^-(\d+)/);
 	$n = defined($n) ? do { ++$n; "#n$n" } : '';
@@ -51,6 +52,11 @@ 	($n) = ($cb =~ /^\+(\d+)/);
 	$n = defined($n) ? do { ++$n; "#n$n" } : '';
 
 	$rv .= qq( <a\nhref=$spfx$oid_b/s/$dctx->{Q}$n>$cb</a> @@);
+}
+
+sub oid ($$$) {
+	my ($dctx, $spfx, $oid) = @_;
+	defined($spfx) ? qq(<a\nhref=$spfx$oid/s/$dctx->{Q}>$oid</a>) : $oid;
 }
 
 sub flush_diff ($$$$) {
@@ -90,11 +96,10 @@ 				}
 			}
 			$$dst .= to_html($linkify, $s);
 		} elsif ($s =~ s/^(index $OID_NULL\.\.)($OID_BLOB)\b//o) {
-			$$dst .= qq($1<a\nhref=$spfx$2/s/$dctx->{Q}>$2</a>);
+			$$dst .= $1 . oid($dctx, $spfx, $2);
 			$$dst .= to_html($linkify, $s) ;
 		} elsif ($s =~ s/^index ($OID_NULL)(\.\.$OID_BLOB)\b//o) {
-			$$dst .= 'index ';
-			$$dst .= qq(<a\nhref=$spfx$1/s/$dctx->{Q}>$1</a>$2);
+			$$dst .= 'index ' . oid($dctx, $spfx, $1) . $2;
 			$$dst .= to_html($linkify, $s);
 		} elsif ($s =~ /^index ($OID_BLOB)\.\.($OID_BLOB)/o) {
 			$dctx->{oid_a} = $1;