lib/PublicInbox/ViewDiff.pm | 4 +++-

diff --git a/lib/PublicInbox/ViewDiff.pm b/lib/PublicInbox/ViewDiff.pm
index 45d28e37792146cbdfd2d4e3c3e93e92241a251c..a8045687ef48b59c0755f4e7b8f750aa722a07d3 100644
--- a/lib/PublicInbox/ViewDiff.pm
+++ b/lib/PublicInbox/ViewDiff.pm
@@ -107,9 +107,11 @@ 			}
 			$$dst .= to_html($linkify, $s);
 		} elsif ($s =~ s/^(index $OID_NULL\.\.)($OID_BLOB)\b//o) {
 			$$dst .= $1 . oid($dctx, $spfx, $2);
+			$dctx = { Q => '' };
 			$$dst .= to_html($linkify, $s) ;
-		} elsif ($s =~ s/^index ($OID_NULL)(\.\.$OID_BLOB)\b//o) {
+		} elsif ($s =~ s/^index ($OID_BLOB)(\.\.$OID_NULL)\b//o) {
 			$$dst .= 'index ' . oid($dctx, $spfx, $1) . $2;
+			$dctx = { Q => '' };
 			$$dst .= to_html($linkify, $s);
 		} elsif ($s =~ /^index ($OID_BLOB)\.\.($OID_BLOB)/o) {
 			$dctx->{oid_a} = $1;