diff --git a/libtransmission/completion.c b/libtransmission/completion.c
index d44d3c769..1a346500d 100644
--- a/libtransmission/completion.c
+++ b/libtransmission/completion.c
@@ -304,7 +304,7 @@ tr_cpHaveTotal( const tr_completion * cp )
 void
 tr_cpGetAmountDone( const tr_completion * cp, float * tab, int tabCount )
 {
-    const int tabSpan = tabCount / cp->tor->blockCount;
+    const int tabSpan = cp->tor->blockCount / tabCount;
     tr_block_index_t block_i = 0;
     int tab_i;
     for( tab_i=0; tab_i<tabCount; ++tab_i ) {