diff --git a/gtk/details.c b/gtk/details.c
index c40d06241..d8053517e 100644
--- a/gtk/details.c
+++ b/gtk/details.c
@@ -791,7 +791,7 @@ refreshInfo( struct DetailsImpl * di, tr_torrent ** torrents, int n )
             str = none;
         else {
             char unver[64], total[64];
-            const double ratio = 100.0 * ( leftUntilDone ? ( haveValid + haveUnchecked ) / leftUntilDone : 1 );
+            const double ratio = 100.0 * ( leftUntilDone ? ( haveValid + haveUnchecked ) / sizeWhenDone : 1 );
             tr_strlsize( total, haveUnchecked + haveValid, sizeof( total ) );
             tr_strlsize( unver, haveUnchecked,             sizeof( unver ) );
             if( haveUnchecked )